Malicious PDF — malware analysis report

Static analysis result for SHA-256 782a04502ea74eac…

MALICIOUS

PDF

93.7 KB Created: 2021-07-30 07:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: d993d4e1941a7843eb63a2d23877e3f8 SHA-1: f8e77a653739889eb6dd71837c6a2c5259c5c308 SHA-256: 782a04502ea74eace52d0927c66c0ff92312aa51a77a44fc875e2e4def8355dc
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely provides instructions to access a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4a3161e30---13308108115.pdf In PDF document text
    • http://nonstopsushi.com/uploads/files/nuzutoke.pdfIn PDF document text
    • http://eltdb.com/UserFiles/files/23567679069.pdfIn PDF document text
    • https://menu2uplus.com/images/file/996847961.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/35ca57c3394d551d7c617fe10fa28c13/10427596595.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/zaliro.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/figepos.pdfIn PDF document text
    • http://reklamavysocina.cz/UserFiles/File/82100459481.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/wotudego.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5df9e78ed---wemanajefadugififosoloku.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/poxubijonuwer.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/21477295938.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/90969023334.pdfIn PDF document text
    • http://fletcherfamilyreunion.org/clients/52745/File/suxumulige.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aca4ec99d7a---kugezugaforuborogadapodid.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/d45f1d1e502151b59831b1839fd45c3a/35852283511.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/gabojoxesutag.pdfIn PDF document text
    • http://deckdreams.ca/clients/3/34/34055ef41782f8f15ebf372c1e39ecad/File/40514120586.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160abfd8509bbd---86186397117.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160982ed26ba11---58124293875.pdfIn PDF document text
    • http://gmicropilotes.com/uploads/files/48208292004.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/8132922333.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/eb74cbcd43def82bb5cc00b2c44b5b2d/vegigaje.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160baf74244443---76399914841.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/rmvjn71agm084hkr18fqs3q8p5/63693774194.pdfIn PDF document text
    • http://luberoff.com/userfiles/file/webosigilexatib.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/qo6fhvn92ei6p2b6m0gd7no7tf/melawarubilikisu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=como+desbloquear+un+samsung+a20+con+patr%C3%B3nPDF 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_off0001043a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043A 18152 bytes
SHA-256: f89b5a773d44a01d95833ba9b3ff6c17c4ec8819c1c002dbf8930d1c4afb4dc7
font_01_sfnt_off00013263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13263 11564 bytes
SHA-256: 299ae8f29d55cf4f171437206f29680cf14b5f180bdb0dfc2d56a0819b2750be
font_02_sfnt_off00014ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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