Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd9296cc26c17e66…

MALICIOUS

PDF

82.5 KB Created: 2021-04-30 21:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 103763f935b10fe12c3a5ec13429ba07 SHA-1: cdfb7502966b55f37ef3d24026f06d4c9699fa4d SHA-256: fd9296cc26c17e66ea0143f4409cb724d463f318e9312b382e5f2748b8d64e98
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to direct users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs and the PDF's structure point towards an attempt to exploit search engine optimization techniques to lure unsuspecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/strik?utm_term=how+rich+is+james+st+patrick PDF link annotation
    • http://lojasamericanasbr.com/how_to_thank_someone_for_job_offer71uo7.pdfIn PDF document text
    • http://trokot-shtorki.online/kershner_flight_instructors_manualx8xk6.pdfIn PDF document text
    • https://mojivisosodarez.weebly.com/uploads/1/3/4/0/134096231/4364774.pdfIn PDF document text
    • https://cdn.sqhk.co/duvapegoleva/jg0xGhd/galaxy_glory_hack_mod.pdfIn PDF document text
    • https://risimukino.weebly.com/uploads/1/3/1/3/131383953/japugazexutaf.pdfIn PDF document text
    • http://wonder-ita.fun/8472375104945guj.pdfIn PDF document text
    • https://cdn.sqhk.co/xanodujijefu/jc6hfge/39160196710.pdfIn PDF document text
    • http://reduslimitalia.site/538139657023jjo7.pdfIn PDF document text
    • https://cdn.sqhk.co/pevelefotuve/aa2hbic/nuxoxusuli.pdfIn PDF document text
    • https://cdn.sqhk.co/fugutexifi/eGGzPic/xoziwulozof.pdfIn PDF document text
    • http://raifaisentgo.online/husqvarna_372xp_for_sale_canadajpi2g.pdfIn PDF document text
    • http://sis-paypal.com/rusogusarezasesei36s5.pdfIn PDF document text
    • https://wuzakadebetes.weebly.com/uploads/1/3/0/8/130814976/36e4b.pdfIn PDF document text
    • http://mattelipsticks.site/oliver_twist_oxford_bookwormsu2ydk.pdfIn PDF document text
    • https://cdn.sqhk.co/nasubivapu/fggAiia/the_sims_mobile_online_oynan_yor_mu.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/gfohjwW/crickets_meme_sound_effect_download.pdfIn PDF document text
    • https://cdn.sqhk.co/dedomafub/e0WpdW5/molagoxog.pdfIn PDF document text
    • http://parhelifrl.space/predicacion_el_poder_de_la_oracionz4v45.pdfIn PDF document text
    • https://wovupidej.weebly.com/uploads/1/3/4/6/134687137/powuwolom-lusinojubir.pdfIn PDF document text
    • http://mif-smeh.space/dragon_ball_z_full_episodes_free_dowuxovx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2de7f091-1425-40e5-898f-390f0d93b0af/how_to_use_a_rebel_canon_camera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b33fae8f-1f75-4a57-9b08-10be2886d300/wagner_flexio_590_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8189beb7-faad-4f1f-94ca-cabd09e85196/579939225.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BF 5336 bytes
SHA-256: f1476f2faf6734880e5da79e4982f8d39acf32fd454cbce40514fb0f184e0b12
font_01_sfnt_off000114ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CA 11400 bytes
SHA-256: 05335169e06eee27ddec0d545d75ddb1f45104f6b2ebd96e2ca550d14ec25e23