Malicious PDF — malware analysis report

Static analysis result for SHA-256 64fdfdc945c984c5…

MALICIOUS

PDF

82.2 KB Created: 2021-08-15 13:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a6b13d3d2666e2002b71a61119c484ba SHA-1: d6ee24365143dddfce01dcb2bb47d3642f7216fe SHA-256: 64fdfdc945c984c5da3a9e43321b9068f4317e87dd9ea5c12f5057d9e025b4b9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, likely intended to redirect users to malicious content or phishing pages. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, suggesting a deliberate attempt to obscure the true malicious destination through a large number of links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=what+is+the+bolt+pattern+on+a+1994+ford+ranger PDF link annotation
    • http://tetrafluoro.com/upload/files/43777881984.pdfIn PDF document text
    • http://www.zima.snowcat.pl/admin/ckfinder/userfiles/files/fuxevatobo.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608309bfd7826---67883127187.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccdc991410---68603423867.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/wipidagararopuvixaxagad.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/bonivuje.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bea5ba842f5---87459951793.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/fujomoje.pdfIn PDF document text
    • http://sandsflooring.co.uk/ckfinder/userfiles/files/22644801825.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160854f20344f1---zewogafewixukuxurawulef.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/d42808ddbe75af5b5b9b1d2325a75c26/78844586662.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e88ddcef5---16287385097.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/fcd835adf0ed5927c22e7f40801975a9/37705463213.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2cad0ee168---lipebodijixewuretadu.pdfIn PDF document text
    • http://appletechsolutions.com/userfiles/file/36544013759.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/tiwamenixarosadi.pdfIn PDF document text
    • https://bselink.com/userfiles/file/50217482212.pdfIn PDF document text
    • http://itfind.ru/uploads/file/57083728245.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/bkamfke79eaistl4slblbs20ne/suduporavibetire.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/h94vduhaabc848nkcpsgab2m59/37358570938.pdfIn PDF document text
    • http://naasschoolofmotoring.com/fckeditor/userfiles/file/52538351584.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/04c60c0ab877d6be318f6e0860c939f0/kaboruroridepatakugoro.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/r87ed1gteqkkbrqu81k129h24e/serozuxujuwadugodon.pdfIn PDF document text
    • 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_off0000dde5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE5 11208 bytes
SHA-256: e6eba6ab8fef7328740bb9d75c68e4b43e9e56b0b2d9dc1e8feec7ad2b38fb07
font_01_sfnt_off0000f7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD1 16356 bytes
SHA-256: c9ceb7fa7bfe41e621232bbbf17d10be72e5eb4c48b3e7a3be231f2a654c0505

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