Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce10ae3000ade26…

MALICIOUS

PDF

77.4 KB Created: 2021-08-02 03:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 62dd5baa233893b03899ff1a20b49b8e SHA-1: 165bad12c8c2eac682b3b0eaf116a249965a8407 SHA-256: 9ce10ae3000ade26d0c15eded9607d4d311211f6ffb2d5a394f6e8964481f9a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution intent. It functions as a link farm, with numerous embedded URLs pointing to compromised websites, likely to redirect users to malicious content or phishing pages. The PDF structure and embedded links suggest it's designed to exploit user trust and lead them to further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://wastran.ru/uplcv?utm_term=what+does+e1+mean+on+accu+chek PDF link annotation
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c4195b7df1e78528195fa4375fc064eb/gikanifefipe.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/93282911a0acbb5ea3dda85e17d48743/27430651974.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160983f7570e06---guxonimuru.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/7deb49a90909de98d56d472514323083/dimosatapekajovopek.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/681568ba28917e2f60b16774f9950026/66303219079.pdfIn PDF document text
    • https://airtelco.com/data/users/_/email/files/36037983681.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/64645155367.pdfIn PDF document text
    • http://olynskiconstruction.com/pics/file/nejivesimonajo.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d721b47c7b4---xikisixorineporunaz.pdfIn PDF document text
    • http://bethelhanberryaaa.com/clients/2/24/2465ef4bb9bb1b7382310ae17d7cafeb/File/wagedig.pdfIn PDF document text
    • http://fittbike.hu/files/file/65403771309.pdfIn PDF document text
    • http://pressvaluation.net/userfiles/file/78702339364.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/25851828683.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/85c6e0d3841779e109f9969fdb9f7e64/pagiwulojabowiselevokawu.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/3c960694790f90c3ae449131c899af28/gabokipusalonugakow.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/fe4cfd678d480aefc324cf47f86b3822/gitud.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/30434349000.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/4dtdpjpp0peb9rt0rb1iu2qt13/82028447260.pdfIn PDF document text
    • http://clasesholandes.com/userfiles/file/55566469438.pdfIn PDF document text
    • http://spzpoz-zdunskawola.pl/upload/file/48410927957.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/0c6cbb5e9217a5b3f8760994f36d5a7d/bovav.pdfIn PDF document text
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E3 10636 bytes
SHA-256: 6f70fd1da7f2faee406cf22f199cc6b65e593be1b2a9d52bcc95db4e8d353663
font_01_sfnt_off0000de28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE28 19208 bytes
SHA-256: 40547e3f1fe2af848741eb8b29009b0bbb62868d098ac7b5c56b29e25a52f6a3
font_02_sfnt_off00010db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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