Malicious PDF — malware analysis report

Static analysis result for SHA-256 c95ca2cd6daddeda…

MALICIOUS

PDF

88.0 KB Created: 2021-03-30 04:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 4b38311bb00ce4bd30912bde9b4436f5 SHA-1: d078c0468c538811fef69b58287e289455cd5b9f SHA-256: c95ca2cd6daddeda9f5c8f9546334b22bdd6c21ea864229d70c1285d0d24f601
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous embedded URLs, with at least one, https://pelibifir.ru/strik?utm_term=jump+force+dlc+release+date+2020, being flagged as an external URI and likely part of the phishing lure. The document body, though heavily obfuscated, appears to contain text related to a game DLC release date, further supporting the phishing pretext. No scripts were extracted, but the presence of multiple external links suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/strik?utm_term=jump+force+dlc+release+date+2020 PDF link annotation
    • http://topsol.xyz/aami_bmet_study_guiderxaax.pdfIn PDF document text
    • https://rivixajonezil.weebly.com/uploads/1/3/1/4/131437445/88424e7.pdfIn PDF document text
    • http://copyright-security-ig.com/tilefotojukpwzx4.pdfIn PDF document text
    • http://fortuneo-enligne.com/highly_rated_appliance_repair_near_meuviwo.pdfIn PDF document text
    • https://nusutena.weebly.com/uploads/1/3/0/7/130739474/narubevano-renojevi-mimelemevuj.pdfIn PDF document text
    • http://nukicew.xyz/how_to_replace_brother_mfc-9970cdw_fuser_unitw7qfb.pdfIn PDF document text
    • http://malespw.xyz/farmville_2_bonus_collector_free2dnf3.pdfIn PDF document text
    • https://saselafe.weebly.com/uploads/1/3/4/8/134894966/xusajedise-setedegusuk-waden-vexaxavudena.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://29159626-56e2-4eb2-a8c1-eb081f451e44.filesusr.com/ugd/a58502_f6c90c1d163f41ca9be0573e5be28a02.pdf?index=trueIn PDF document text
    • http://bopudax.epizy.com/gimugosifagidip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2c5227f-8735-47e0-b2f1-c0124da52bf4/pedunafeliru.pdfIn PDF document text
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_56615c572d2a4a498c2339eafa13b514.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/613a3dc2-f6e6-4f16-8a0e-16a772b4fd78/constitucion_de_venezuela_1999_derechos_humanos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85c940ee-c97b-45d3-a71a-091a6fd92430/silence_of_the_lambs_sequel_to_manhunter.pdfIn PDF document text
    • http://mexesumofiruvaf.rf.gd/gitejilaviwozilofumanen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1960a9ed-f9cc-4c07-9459-e1581a87e2ae/how_to_teach_habits_of_mind.pdfIn PDF document text
    • https://7c9e9c40-2b96-4f88-8065-b5ff5e495659.filesusr.com/ugd/3bfcae_2d587d37159f48f88ae59d74dd82b701.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10283 6356 bytes
SHA-256: 9b02f14b35f4a4cce7f89d59341efa9a69de67e172213e2aa546cf1427b821af
font_01_sfnt_off00011790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11790 5564 bytes
SHA-256: 7d0e86c0ce3897e36c28c0405b71d8576a06533d032ac93d689e25d6751d6588
font_02_sfnt_off00012a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A68 12548 bytes
SHA-256: aa3aae916bb21c8c497e49c0e86d942d1e6f1bdcc2e1a30a6cc7625b74ff5c99

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