Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f48f81ea9118d44…

MALICIOUS

PDF

78.7 KB Created: 2021-04-02 06:43:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1aa1781a9580897e3cc1d9f6c4fc2370 SHA-1: 6f2f9145876a7a854f504065a7ade19bb24d62be SHA-256: 0f48f81ea9118d445e42a088b15dfe6f336e7c6262eb38f716d2b81431326e73
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with several pointing to suspicious domains and one specifically identified as a link farm on disposable hosting. The document body, though heavily obfuscated, suggests a lure related to 'Africa map with names pdf', likely a pretext to drive users to these malicious sites for further exploitation or phishing.

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://kuzutuzo.ru/award?keyword=africa+map+with+names+pdf PDF link annotation
    • http://vakekaninu.iblogger.org/gizetolapepojag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413462/normal_6056cff937a95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494674/normal_604cf695a4777.pdfIn PDF document text
    • http://tamakar.tech/definicion_de_andragogiak7pnz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_605669c2cb9b4.pdfIn PDF document text
    • http://particulier-societegenerale.xyz/gulubutiq503p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406223/normal_6063490733b19.pdfIn PDF document text
    • http://testvvd.xyz/dancing_with_the_stars_season_18moanj.pdfIn PDF document text
    • http://nout-prokat.website/sociologie_politique_philippe_braudlxaj9.pdfIn PDF document text
    • http://tugesajudefuk.iblogger.org/star_wars_bloodlines_characters.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ea7788ad-ef5a-48b5-911d-3ad522045378.filesusr.com/ugd/f3bfbb_b4c230726cc04c2788fcc909b932f224.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf5776b5-87b0-4d62-90fb-7502a07d859a/what_is_taylors_theorem_used_for.pdfIn PDF document text
    • https://ffcd7f67-9b43-45c2-8e44-b15cca9583b8.filesusr.com/ugd/48bf55_f4388c45bc8548b2816d3ff15f0dcac4.pdf?index=trueIn PDF document text
    • http://xadogugatu.epizy.com/verbos_irregulares_no_passado_em_ingles_mais_usados.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeb3516b-9aeb-4769-9b8b-20ecdde933dd/27342540894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36054abd-5412-472e-bbe6-05902d38ca12/61298748337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21735ef1-4ab1-4d17-9b25-e9093f9d7777/xagegebuzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/990abb91-5839-43a1-a550-248a7e9c2de0/black_and_decker_rice_cooker_plus_measuring_cup_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bdf3f78-8384-41c1-904b-3aa8d6eab579/wigogomapolagezifa.pdfIn PDF document text
    • https://5b3fc17b-a4fb-4144-9a53-ff617e35bc6a.filesusr.com/ugd/696117_dc33a6d48095444da760942d0f97970b.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF589 5444 bytes
SHA-256: ab127da07434a1b2a4566ea9c55fad5a40156988fa73899b92241a3caf39baea
font_01_sfnt_off000107f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F6 10916 bytes
SHA-256: 973392f5a1f14c66eef023bc612ea0f7ee77273cca994c01c08ab3ed8636f2f7

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