Malicious PDF — malware analysis report

Static analysis result for SHA-256 e429b287183b541e…

MALICIOUS

PDF

87.4 KB Created: 2021-07-30 19:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 49f75ffc9692db528ab958824723ab1a SHA-1: c0a474ac7db719f5d921007fbbe5bdab24516732 SHA-256: e429b287183b541e9b75953ed8e6eea7de52c17f56cf49d24e8a8baf6b356a46
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1071.001 Web Protocols

This PDF document exhibits characteristics of a payment redirection lure, with multiple heuristics indicating links to compromised CMS uploads and link farms. The ML classifier strongly flags it as malicious. While no scripts were extracted, the presence of numerous URLs pointing to potentially malicious PDF files suggests an attempt to redirect users to fraudulent content, likely for financial gain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 9

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/50bb0d1feeeedf3222828a781d72f997/wakijukifirixo.pdf
    • http://umiyawoodworks.com/fckdb/userfiles/file/nuwulafeguge.pdf
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/3a4c90e270bed6760a0e0b97c0d68ebb/vilowasowebawewu.pdf
    • https://cafesca.org/ckfinder/userfiles/files/61110972273.pdf
    • https://goldenapp.net/file/24572760950.pdf
    • http://chatsworth72.com/clients/5/53/532ec3c8dc0e95779814939736d4df6d/File/25619423156.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/16d2106270cf8179864d03e5f44148b3/34918429024.pdf
    • http://nbnjl.com/userfiles/files/mogiziwikove.pdf
    • http://3bbb.fr/ckeditor/upload/files/18136774813.pdf
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/1bf4dd6304cbab22316169aa98480722/xokine.pdf
    • http://kolkandkolkdesign.com/site/data/ws/files/tipazivefinesisenilofowe.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/46ncggree2k9idac11153clalg/91421189193.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160765d032f898---niwinoveladujelabuf.pdf
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830f17aa80d---rozizakarinanakudom.pdf
    • https://planet-for-events.de/userfiles/file/42963474390.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/bc97e9a05dbc743f40a75c61cc0e9e00/22908586673.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/0eb8259ce2ed65a9cc0059d97f7125a2/33442308683.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/179919cff0a2d70b6283a7543582f693/nared.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/65918cd12b07d4355c1a97d2d64a324e/50824028679.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/414316a3d6d1705878cc392ed65c8ff8/6438378494.pdf
    • http://aranykoronakft.hu/userfiles/file/sorurinonenuverovaweleso.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866968cb199---fudoravujipitiwe.pdf
    • https://holocaustresearch.pl/nowy/photo/file/7545462225.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+create+fedex+air+waybill
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea89.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA89 16792 bytes
font_01_sfnt_off0001029b.bin
80c18908ba0b56007970d63f7a56399bbcf38ce4b4af6d597023bd4c0348985b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1029B 20732 bytes
font_02_sfnt_off000137b0.bin
e20dd5f0b67a086576977a2dcf353f708e515657670f19e1f0212f63441eb0bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137B0 10628 bytes

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