Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f7e03a0d8344951…

MALICIOUS

PDF

103.0 KB Created: 2021-06-28 11:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 68d0a2c572d016904d188bbddfc3f292 SHA-1: f3ef78ee88d6e39f84101db81d7c0a0feee4dad1 SHA-256: 5f7e03a0d8344951e7a9357287ee8c8215d4d4a39294e64a2192b2b362c4db71
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The PDF's structure and embedded URLs indicate it is designed to act as a lure, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9767

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/6338fe79c7838049797e7a2a444d7c84/pinuwe.pdf In PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607059b04ec9d---refokepusomepapoliladofij.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c93884e4b86---9517156730.pdfIn PDF document text
    • https://ckmandarin.com/uploads/vusidogotixaluxepasewufit.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/26ff06445813e84509e5d87879bea0ab/58709213317.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160898dbadbde9---wovaxefufit.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa25ca00de3---75790615197.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/tazafomegawovikoga.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/3b0bb7ced1eba13497b62658ab3334c5/kanefemiboduwu.pdfIn PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/70979079615.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/46794032022.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a7bcaac52d1---nofoxakagopotok.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a079a19169---95423191053.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d6bf5ab05---fubojeselaleto.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160703ffac0d92---jifenufomulilubixajutu.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/b0410c822778605236fbcfa5c450174c/rutanud.pdfIn PDF document text
    • http://j-club.eu/userfiles/file/majigefefogoj.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f39bb5658d---58506959964.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/25010474354.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b55ee19d9fa---53500134098.pdfIn PDF document text
    • http://innobiztour.com/FileData/ckfinder/files/20210622_DE1073120C9776E6.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/ae5125201ad4751e1ec10478c66caa16/73388991749.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8542b2938---23635543480.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073822b2fb3a---56655559723.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/a9b4fe6980bb02ceed3d024202b3f79b/22018748731.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=no+guff+meaningPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011805.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11805 19080 bytes
SHA-256: 52356fc6fdff193754ad4bf77b01f2e19ab5d0d0965632626b72942e2283ec9b
font_00_sfnt_off0000f0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CC 10224 bytes
SHA-256: 1838131c5ff81ff08adae399f591a3f5972ab672021623d42db2e5a2d9b5f8b5
font_01_sfnt_off000107ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AC 4348 bytes
SHA-256: d8d91bc366a394ee8168bdff93a7ef64d180a87808b7088b7ac968d682199ae3
font_03_sfnt_off000137ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00015011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15011 24584 bytes
SHA-256: b4336b390483fe12b851a288438cd700896aa548e717e216aeb2e88b5a526d9d

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