Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65897da770faa8f…

MALICIOUS

PDF

85.9 KB Created: 2021-06-06 21:04:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76033442ad1b91637a4e623de903b4ce SHA-1: e1b1ee0262c65c62c3dd1bbdec98c848fc5e3fc6 SHA-256: e65897da770faa8fba43fd6493d61037bb28973184c4dd4c9859a17386167f01
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL suggesting a lure related to a movie title to entice clicks. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nomylo.ru/pbw?utm_term=love+in+the+time+of+cholera+movie+online+in+hindi
    • https://static.s123-cdn-static-d.com/uploads/4374211/normal_60b11ac9b2abe.pdf
    • https://cdn-cms.f-static.net/uploads/4404727/normal_6036874ae961e.pdf
    • https://static.s123-cdn-static.com/uploads/4392472/normal_5ff6710b4928e.pdf
    • https://cdn-cms.f-static.net/uploads/4382423/normal_604bb97262081.pdf
    • https://nubegajal.weebly.com/uploads/1/3/4/6/134668927/vowir_xuzunek_letakiwafupiput.pdf
    • https://juzemadarerux.weebly.com/uploads/1/3/1/4/131437885/6423525.pdf
    • https://cdn-cms.f-static.net/uploads/4481158/normal_6066c911c55d0.pdf
    • https://fozikubovofow.weebly.com/uploads/1/3/4/8/134897471/kekevuberutagaf.pdf
    • https://xefitopabez.weebly.com/uploads/1/3/4/8/134865339/gelolafolagidoremi.pdf
    • https://joxoxego.weebly.com/uploads/1/3/4/6/134664344/wupivewaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/54f88d21-5568-4ffd-97a6-500b51e6f8b3/positive_thinking_worksheets.pdf
    • http://lesokulovisu.pbworks.com/w/file/fetch/144624960/how_to_get_girl_voice_changer.pdf
    • https://uploads.strikinglycdn.com/files/2c4d85f4-b1a6-4c8d-8eba-18742c140287/zafozifuxamoworas.pdf
    • http://jolowajuwijo.pbworks.com/w/file/fetch/144507498/dakifuwexeg.pdf
    • http://nikekuva.pbworks.com/w/file/fetch/144426627/how_do_i_file_a_new_unemployment_claim_in_oklahoma.pdf
    • https://uploads.strikinglycdn.com/files/1cd0eb60-2216-446d-9894-571dd06c598a/kuragefabidagobub.pdf
    • https://uploads.strikinglycdn.com/files/d8bb102f-c6bb-4429-946c-9aba3c6230a6/what_do_the_number_30_mean_in_the_bible.pdf
    • http://buluwogot.pbworks.com/f/10344308573.pdf
    • http://xosufixemuf.pbworks.com/w/file/fetch/144598827/what_is_the_theme_of_lines_composed_a_few_miles_above_tintern_abbey.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001114c.bin
777bc006d7e43831c6f665e9fdb5af0a22d670b6cc8c84609f4b36eb99bf8ac5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1114C 5084 bytes
font_01_sfnt_off00012276.bin
45c13a6d2e76c51b9442c3b235603a9dda4c391ca71bc201cc288b76fde74037		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12276 12160 bytes

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