Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f0571aeb92bbe20…

MALICIOUS

PDF

84.6 KB Created: 2021-07-07 00:36:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 07fce394f74b96729451018a71a64832 SHA-1: e07aafceb9be6b23385023479aa7b192e958dd54 SHA-256: 7f0571aeb92bbe20c6a62cd0cd8834755e3c329c8e14570ec01213937dcbaf4f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on compromised CMS uploads and disposable domains. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lure users to phishing or malware distribution sites, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/4e375d785cab6056049489f19b3b2e78/56932598726.pdf In PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c52bb47a4b1---wufexuxewakosukonamuvagar.pdfIn PDF document text
    • http://ruresept.ru/files/file/2853505563.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085088a9026a---beluloxawovanas.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/tusaz.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/76172606905.pdfIn PDF document text
    • http://ahhsclassof1980reunion.com/clients/e/eb/eb0bda5e83c72ae03ef0bdd1ae4752ba/File/navurawofelujozamipix.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/26486b0afb39516b14c0434b9ac1c9a5/40313821539.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af7638ab7c1---76452982309.pdfIn PDF document text
    • http://tochalco.com/uploads/files/59630472886.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b445de88b26---4052906302.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/53171918554.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093dab1e8624---sunomidabapewedo.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/52059404014.pdfIn PDF document text
    • http://paradisetnl.com/FileData/ckfinder/files/20210623_53A7B3B08979D93D.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad76e96557e---dibulopokafemomuseruki.pdfIn PDF document text
    • http://sieuthivatlieuhoanthien.com/upload/files/6610271282.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088a2e33b46f---vemimalepoforetusux.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1737d5766c---87813240592.pdfIn PDF document text
    • http://rayanchem.com/d/files/welonolisefevi.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/muvajubu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=meaning+of+bordPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FE 17132 bytes
SHA-256: 220ef4776be63edcc9c987cc8bdfc6708752772cd8392ae0f920c1b02c13a19c
font_01_sfnt_off0001167c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1167C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E93 10348 bytes
SHA-256: 0bad073adb043c9eaa983c8ef73b46a3e2119e6d1bbbae3e65261d497f61d86d

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