Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa7ae8dc9c4abec…

MALICIOUS

PDF

80.5 KB Created: 2021-09-02 00:05:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0101ed4ace7b7737156762e48f9d3692 SHA-1: 626add8db48c96bf5b3c2cc26ab9aa1c9c385bc3 SHA-256: 4fa7ae8dc9c4abec4bc7e239139fb9c55f9b27b371e2afd1efcd41552512eec1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which appear to be compromised or hosted on disposable infrastructure, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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 http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/gq31h961kqs1al4o7rkuh5a2s6/24579468587.pdf In PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/ad1120a1a0367aa111bb16a3cf311c17/lajirapopo.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/86923204233.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a626b8e09d9---56890414572.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/a1e9b360b4b56c07db2b6894261b2aaa/poferegivejazavadi.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/tojugepivarut.pdfIn PDF document text
    • http://capthepcongtrinh.com/uploads/news/files/wunidabobi.pdfIn PDF document text
    • https://stayinbranson.com/ckfinder/triplebuserfiles/file/27264257803.pdfIn PDF document text
    • https://youkuvpn.com/upload/files/89484531286.pdfIn PDF document text
    • http://dunajecbiala.pl/upload/File/wofenutojavofeti.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/fiponixobilavarafomog.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/e9675c37dafc1f8cb466b01f98555046/xokivixozonotutosuf.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16104143511573---zinewazivagonigunakase.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/kutukuxo.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/6536ggn1pbp68bo3241taioku5/gonaxerafepebazadilisobef.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/38770276646.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/44778373788.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/60563211307.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/90953728089.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/r2n62jgsmijm8i7plgd0hrjgh7/17905755018.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/2e7b5fcd589f03e1e1a59d3d63f2708c/63146555368.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160942d9478752---vizon.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/56476hnul2ee9k8okjjdi8nbb1/welorerikafofezasibefiz.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/4onmsj60j2t4ufnrgl8hjedk10/19517303513.pdfIn PDF document text
    • http://yacpa.org/yacpafiles/file/xewejipowi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=coleman+pop+up+owners+manualPDF link annotation
    • http://pro.ovh.net/~tribuene/images/banque/file/43972303253.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_off0000d397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD397 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAE 10440 bytes
SHA-256: 75251e2a7202621b4aa3da6bcc4d8e675beb96b178969ee42d81f4dc9b6f222e
font_02_sfnt_off00010367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10367 18540 bytes
SHA-256: 33e8fa718054f93cb7b7f135e590266da7a8fb3ff7f49cc7af0bd041f64c3386