Malicious PDF — malware analysis report

Static analysis result for SHA-256 f909c685e42c0fb7…

MALICIOUS

PDF

88.5 KB Created: 2021-07-30 09:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 96b36eb4a8a4321164240a63d0121302 SHA-1: e953d6e25b06ba33c14044ade3717a61a0f0f27c SHA-256: f909c685e42c0fb7a0625b1b5f4c9bddf834439dd405e68aec4c71b10c41e717
216 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier. Heuristics indicate it functions as a payment redirection lure and a callback phishing lure, suggesting an attempt at financial fraud or credential theft. The embedded links point to compromised CMS uploads and disposable hosting, likely serving as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/ce89c01f7ea4fbf22e530d216eac8d31/1434120537.pdf In PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a241fc23721---weforagexepuj.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b5bb3706e---820680336.pdfIn PDF document text
    • http://vhs1962.com/clients/b/b9/b967f936f519796c2a696a6ed1da67f9/File/bukumomafaj.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/22b623f7ea08a420e75f02c752033b3d/pubadaranipenoberalulabo.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/e35fed4662c4142688bbcbf6caa4d660/41907157025.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/towoxolaniwesikejotimeg.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/41834106245.pdfIn PDF document text
    • http://thegioioto.store/upload/files/munasiguwewapevuroded.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/fbd6635614174dc12c3c733fd62bea79/mozirizosemerexun.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210519105823.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/45061688200.pdfIn PDF document text
    • http://wallsfamily1912.com/clients/876683/File/muzizipiniromun.pdfIn PDF document text
    • http://gsxr.hu/userfiles/file/70000265079.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/luzijenaturak.pdfIn PDF document text
    • http://misosmile.com/upload/editor/files/tukuwari.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210706_F45018DBC4F7BAAA.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/c36287a4012d0d1500c88f7c88827016/redutewuwofotafutawaf.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/37563630840.pdfIn PDF document text
    • http://ray-king67reunion.com/clients/41562/File/66212136709.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/26dba367283a20af6dd4eed124780b1d/90213525932.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=what+number+do+i+call+about+my+unemployment+debit+cardPDF 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_off0000f517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF517 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D29 17300 bytes
SHA-256: d98c7c7979c1e6cb2063e27e0749d0602c3ac0ffe93f376dd0dac3104f57f819
font_02_sfnt_off00013a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A2E 10956 bytes
SHA-256: 526ab32acc00fad5119a9151fe632eec440cbab0cf7971f5f0051b623226b449

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