Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3b98d6e993d9d35…

MALICIOUS

PDF

76.8 KB Created: 2021-06-06 15:02:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 52d6555b5366ed9b238a9962224f4704 SHA-1: 52f8d265fd6849d63ee0e8190071b2d755902dd1 SHA-256: d3b98d6e993d9d35a2746e2da9c70be44a600a38fca66ec701f649576383979e
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating it is part of a link farm, with one prominent external URI pointing to a "transformers free movie download" lure. ClamAV detection as Pdf.Phishing.Trojan further supports malicious intent. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://archism.ru/pbw?utm_term=transformers+free+movie+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4505125/normal_602770fe3486d.pdfIn PDF document text
    • https://fokuxadeji.weebly.com/uploads/1/3/4/5/134585395/pibusevaximudujav.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4369332/normal_60b570d48c7d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403128/normal_5fdaedbbcf7d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413111/normal_6003dbdd7477b.pdfIn PDF document text
    • https://xawefiku.weebly.com/uploads/1/3/4/7/134753490/juwepafipidu.pdfIn PDF document text
    • https://pareruli.weebly.com/uploads/1/3/4/8/134891857/9272892.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419626/normal_6063d1269ce26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469355/normal_6047840e18389.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448995/normal_60558d0df0cdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486765/normal_6059a96f84b08.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/ee4115b2-4192-461e-9deb-3b8c077376d9/10549452898.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d094a23b-3588-4bc9-9361-7fe22f6013b0/qsc_k12_speaker_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0e3865b-b209-4b75-a400-1fedaa149f39/motetelagupaxivus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ffae757-d174-4cda-baaf-07a9301b4f09/31050018858.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30b8af25-1554-41ab-b0f1-1ddaa6056aa9/tekogejij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf4693a3-e1fc-4eea-b3d9-f7ff8c48dd83/how_to_do_half_life_problems_precalc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/339b4512-649b-46ca-ba9e-62816893f1ef/wopakerezujexofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d5d95a6-527e-497f-938b-5913507537c5/brother_hl-l2380dw_toner_cartridge_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52657689-f970-4eae-b8f3-321ae72d6982/lunutuvubinemowabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e931eb5c-f2c8-47b4-8b44-52a73252d529/inteligencia_emocional_google_drive.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_off0000f004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF004 5152 bytes
SHA-256: 0e5d88cbbed44aca65a51878ee5d93df01e46a3673f1392a98011d355525589f
font_01_sfnt_off00010185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10185 10748 bytes
SHA-256: b2a96e04b0f90f1e3e6b4905f737f7f6e6dc38ce3753292f371489a4344a2bbc

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