Malicious PDF — malware analysis report

Static analysis result for SHA-256 62950858f2805ae3…

MALICIOUS

PDF

82.9 KB Created: 2021-04-01 04:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0bcb060273a9fc66819b5fddda04df19 SHA-1: 9e8e5b5ab409746e79f068a8f2bdd3b09a2236ab SHA-256: 62950858f2805ae3248fcc5b85f3c20424baef1c3a3658e195eaa4960074c55e
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/wix?keyword=trigonometry+lial+hornsby+schneider+11th+edition+pdf PDF link annotation
    • https://tekopazaxalar.weebly.com/uploads/1/3/4/3/134348639/1720791.pdfIn PDF document text
    • https://wimaxexuxiwob.weebly.com/uploads/1/3/0/8/130874544/wogus.pdfIn PDF document text
    • http://energierecrute-emplois.com/uefa_champions_league_2020-_214hehk.pdfIn PDF document text
    • http://xavelodezazil.iblogger.org/mississippi_burning_full_movie.pdfIn PDF document text
    • http://rimka.xyz/rimas_asonantes_y_consonantes1603d.pdfIn PDF document text
    • http://dadanimosiv.22web.org/5226056549.pdfIn PDF document text
    • https://pigunakates.weebly.com/uploads/1/3/4/6/134628742/tepukexiroj-kugenapekavife.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_b826a7ae5e4d4fb9a49c9c910890386d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a6b9625-1d77-46ca-8eaf-93f8ffbdea9f/html_css_jobs_for_freshers_in_mumbai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98c60b65-df82-4557-b034-dbb2eda4d176/samsung_tv_remote_bn59_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a072ca35-69e6-4959-8ef4-4f8751820340/how_to_draw_different_anime_girl_poses.pdfIn PDF document text
    • https://e0bfa911-60eb-4c53-bd8d-ceec25156dfb.filesusr.com/ugd/0a052f_96a1925d4497406bb5426e0206d43d14.pdf?index=trueIn PDF document text
    • https://72858ab8-d36f-4bc2-b208-e5ec56e76d01.filesusr.com/ugd/3a4e0e_9d9bd84228b24af4b2a68fd53ce2c655.pdf?index=trueIn PDF document text
    • https://42f4b946-f871-4f2a-a73e-6571c6569919.filesusr.com/ugd/e20521_6e7a11a399d24a5294bcf6ef20c710a9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c7848c1-5962-478f-8ed7-64ddb10c3657/best_kitchenaid_stand_mixer_black_friday_deals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8864453-fb54-400a-a691-864477302d6e/59352472156.pdfIn PDF document text
    • http://zegaruso.rf.gd/6996868206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47cef9a6-3455-4c5c-a0af-d650add9623a/volvo_penta_duo_prop_outdrive_parts_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b85da06c-915c-4f07-a9ab-4f475a825742/what_do_you_need_to_get_married_in_the_caribbean.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_off00010462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10462 5812 bytes
SHA-256: 749d815894911269dedcf0ec2625340946b6af03fee30162f21524baf2a9a28e
font_01_sfnt_off0001180b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1180B 11288 bytes
SHA-256: d0819301885c05c6ba00e6b78051dec454dc1812d07b524ab2389756dfc94a0f