Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ea6649165d3d42…

MALICIOUS

PDF

90.4 KB Created: 2021-06-26 04:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 74c7f909a5a23479e845fa866aa6be35 SHA-1: de1bd3e7c2e3c4faf899dd36d2ae94a0fbef40bd SHA-256: c7ea6649165d3d428e00d8ba3670d6822fc1289c07a49feccb4c2ff31a5b0775
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is unreadable binary data, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

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://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/8565ef389b1083e80935afe93f79f58c/39060017632.pdf
    • http://www.aqsclimited.com/EditorImages/file/17086780773.pdf
    • http://jagodkaprzedszkole.pl/userfiles/file/pesimanakifigavolaruvu.pdf
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/2cefd890b249c4605e29c6cbe486244c/paxubamorinipimibu.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099c4e004c40---livariresorekow.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/f385f82cf7f4fc345dfe331a802a9911/41655951752.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dae459e53f---fofunimusubepasesidod.pdf
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/hcdcsm6cm7vf1vv7e55iud83a1/tutakupune.pdf
    • http://transcash.com/ci/userfiles/files/16989131158.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/8cdf6f5bbe1ce4937525daaa71a52fc9/7461842848.pdf
    • https://castilloexterior.org/ckfinder/userfiles/files/xutoludovemano.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/16071d9a130025---domopesimajuzekofatoz.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e0cf8296e---66328285433.pdf
    • https://resonanceacteurs.nl/userfiles/file/66446711633.pdf
    • http://www.klimavill.com//data/editorfile/nomubojenu.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/f5c8ed6b143a88cd3fd4efd778c9e319/84099561084.pdf
    • https://mamotato.ro/userfiles/file/88119236142.pdf
    • https://aduanaldelvalle.com/userfiles/file/vitunurojexemupedomin.pdf
    • http://strahovka66.ru/userfiles/file/womirifezepamoj.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/nhlqkif6a6b99ci8imoto89uf5/sisiwavamigowenatover.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16096b6ee8b1b0---kasakinotajopozanoribev.pdf
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/zalufoled.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/8ddf347550530b5cf0d96ad77f5d5728/wigosalimevusukagemewuxa.pdf
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/zakufavufosigofuvujinore.pdf
    • https://callalilyvn.com/upload/files/89251402597.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6b9a299fd---bufudepavozej.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=recuse+meaning+in+tamil
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecf2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xECF2 16792 bytes
font_01_sfnt_off000104ff.bin
3a79faae7966610b2833aaa892c77157f0657a5634af9bb5dec2c57444f96130
pdf-font-stream PDF embedded font (sfnt) at offset 0x104FF 3296 bytes
font_02_sfnt_off00011229.bin
d1cc19ab2cc5dc14b686fba0c1f24d9cb63fa0e267e85236d68dfb6a3934513a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11229 10500 bytes
font_03_sfnt_off00012a05.bin
b1eff87562840e1c20dc30993719c78c5bb5866f12bbf8f2c5eef76b1a394c2e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A05 18988 bytes