Malicious PDF — malware analysis report

Static analysis result for SHA-256 fea02e97c29d0fe8…

MALICIOUS

PDF

75.5 KB Created: 2021-09-06 07:28:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 76fb9df97837e901d8cdbda646a066d9 SHA-1: cb5de9577d14293bcd5c3f65b014c27ca4fb8c18 SHA-256: fea02e97c29d0fe80860abd7a38277f099611686ac45cde2fcc8d182353f55ce
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute malicious content. The presence of embedded URLs and the 'Fake invoice / payment lure' heuristic indicate a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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.
  • 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://2acontractor.it/images/file/47508421846.pdf In PDF document text
    • https://maggies-handmade.com/UserFiles/files/poxozonozova.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/98881705936.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b654709fb44---duwudoxozumuw.pdfIn PDF document text
    • http://fobas.cz/userfiles/file/36871418040.pdfIn PDF document text
    • http://ofitecnic.es/files.ofitecnic/fck_up/file/30753156801.pdfIn PDF document text
    • https://momentous-inst.com/uploads/image/files/retowasatimelipuvus.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/8d29ffa92ab214b08aabdca5e331363c/jelofemexojus.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/17519602787.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e48ca52e29e---869207182.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/0c26be3c513c412bf04952cee9c59dfa/xuxosapagugeduwuwa.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/11466385390.pdfIn PDF document text
    • http://inbeeldt.nl/userfiles/file/sopebasemujuwivisur.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/12cff98e7e60861b9d840eb108dcd208/59330619204.pdfIn PDF document text
    • https://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/30310784152.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/16102c9a62b1c3---72852806829.pdfIn PDF document text
    • http://wernitznigg.at/files/32040976288.pdfIn PDF document text
    • http://pecsimutargygaleria.hu/files/file/gujawafu.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a9401cf3ae5---zipifek.pdfIn PDF document text
    • http://boek.se/bilder_umeny/File/22228667877.pdfIn PDF document text
    • http://gyuco.com/uploadfile/files/20210817_175630.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160800c8a7a5b6---14614123012.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/e82383e417291c767717222d1c142eee/9774825560.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///lalokoledidenasexegugojiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=mitsubishi+rvr+2019+manualPDF 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://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_off0000c7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dfe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE7 10880 bytes
SHA-256: 28d55de5023e3d596f2e63a6488d6a307aa45be273840e48b5e4ef0cc5c54fc3
font_02_sfnt_off0000f8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F3 17104 bytes
SHA-256: 5f3d9065a6d7d32a80b737909f8c2910e2ffd6e4d54e62ca6b4ebd008cc30600