Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fafe00d22d0d478…

MALICIOUS

PDF

121.8 KB Created: 2021-07-14 06:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d7fb8079324d2c5bba487e35f70f1025 SHA-1: a858acfb55e57fcfbd05a01c6fdbe359dc67436f SHA-256: 6fafe00d22d0d47899fc4cc8524326178375f8c7d78e931795598ce90ee677e5
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the PDF functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The presence of numerous links on disposable hosting further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://bunyaminerdemir.com/resimler/files/tuzog.pdf In PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160765d8543941---xojegixigosadelep.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a73469869f2---13148102161.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/dgag1vetgggg5ui9a6iig6b7f7/tawitasikujobedovekavuj.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077de05172cb---pedanibakenetexox.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f5c18f64d---kugixiveferekizizufepozi.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/vifagipiwoladiwaripiko.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/94999976080.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e433b658e---vizafok.pdfIn PDF document text
    • http://greenberetrotcmedals.org/clients/e/ee/eef2f5edcbf7b69ea683240098563b39/File/80688217996.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/17364933191.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/93i8vmmsi2fjmplpm6ic0hbjf3/52784894339.pdfIn PDF document text
    • http://chinajnbt.com/images/upload/File/181256867.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5eaae0eeb---95050500241.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/51036413583.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/nukuzumosamidibat.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a99fda015e1---72713432986.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/61103653772.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a8bfbe05790---tupisasepiwatevinajudilif.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/bujafusomujubipor.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743b9450a4f---zopidowezedonodekut.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/82722906301.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa80bbdc0e---tepatemanolamubuwugum.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/11f2c79eb769c1775f97e88175c269c4/tixuwezeti.pdfIn PDF document text
    • https://ivaco.it/file/48186637711.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=les+miserables+musical+moviePDF 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_off0001769f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1769F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00018eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18EB6 10452 bytes
SHA-256: bcb764e2b03404ee1de8eda7a171584a6e61f99f064d73feb22430e31a1bd0bb
font_02_sfnt_off0001a671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A671 19508 bytes
SHA-256: dafb7a74561236717541a57f6be81650a637724ec6e0b87ae8abaf4a68188663