Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29dfeaa109955cd…

MALICIOUS

PDF

69.1 KB Created: 2021-09-27 03:52:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8dde62385ce78c97a2e5b76f3946e69a SHA-1: 9cc118c127e683d7cf4a59a8193871694c90ddce SHA-256: e29dfeaa109955cd92a30cc27c3065283214530a48eb798dc64fb29d34675b5c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic 'SE_CALLBACK_LURE' suggests the document is designed to trick users into calling a phone number, a common tactic in tech-support scams and callback phishing. While no scripts were explicitly extracted, the presence of numerous external URLs, some hosted on compromised CMS platforms, indicates an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://mvpartners.be/images/uploadedimages/file/81099989099.pdf In PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef00356fc7---8024581129.pdfIn PDF document text
    • https://nbc.com.vn/ckfinder/userfiles/files/kitolututemunukab.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16141dcbb9ceb9---dejudonuwatu.pdfIn PDF document text
    • http://cmi.nfe.go.th/ckfinder/userfiles/files/34720104012.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16138b4291200d---79591353433.pdfIn PDF document text
    • https://hw-power.com/uploads/ckfiles/files/61433ec9c31c3.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/kumilugedowofivu.pdfIn PDF document text
    • http://zatexpress.com/upload/userfiles/files/vipet.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/xozela.pdfIn PDF document text
    • http://commandhousecreations.com/uploads/files/55883411972.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/jejimal.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/31711325480.pdfIn PDF document text
    • http://federicozucchettiarchitetto.eu/userfiles/files/xipawirabukiwidofojid.pdfIn PDF document text
    • http://mathcountsoutreach.org/userfiles/file/42444843834.pdfIn PDF document text
    • https://mimpishiodua.com/contents/files/betevekasasiwubof.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d59d7de8f4---72195401021.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/78819182917.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/061121426357.pdfIn PDF document text
    • https://tedesco.pl/userfiles/file/vidurega.pdfIn PDF document text
    • http://phucuongplus.com/upload/files/6239956454.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=street+of+rage+4+download+for+androidPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF72 10600 bytes
SHA-256: c5f433d9f745a0cc819e63970991dbc079737873f9a88036652659cce57960d9
font_01_sfnt_off0000c7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A6 15408 bytes
SHA-256: 84abdc892d6db40896796e93698e552388dd9489feb9d9c53834293e8a6e119a
font_02_sfnt_off0000ee9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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