Malicious PDF — malware analysis report

Static analysis result for SHA-256 0080c15e21b1fa0d…

MALICIOUS

PDF

89.7 KB Created: 2021-02-22 03:30:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c40655e580d3e31b30ac5524552a7d21 SHA-1: b2bc08a1d1fe862e6c2790537babea5780bab8af SHA-256: 0080c15e21b1fa0d674ddd57f9a042fba825e0581f6c45addd76836bf14d4b4a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://maypoin.ru/wix?keyword=northwestern+coniferous+forest+animals PDF link annotation
    • https://cdn.sqhk.co/zosurinipin/gcgfcCp/19997274163.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412160/normal_5ffd303bdd65e.pdfIn PDF document text
    • http://kprovk.xyz/cateterismo_cardiaco_terapeuticohhne2.pdfIn PDF document text
    • https://bifixebuwo.weebly.com/uploads/1/3/0/7/130776276/gemixuwosan.pdfIn PDF document text
    • http://poverkavoda.website/stremio_apk_modj6gb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375194/normal_5fd2d0d162547.pdfIn PDF document text
    • https://cdn.sqhk.co/malofavu/gjbBhht/wuxinaped.pdfIn PDF document text
    • https://cdn.sqhk.co/migazajigum/yjfMjh4/nozenikova.pdfIn PDF document text
    • http://x-bionic.shop/65499800654iost1.pdfIn PDF document text
    • https://tivufotevomok.weebly.com/uploads/1/3/2/6/132682035/7566210.pdfIn PDF document text
    • http://rabota-plus.club/paruzamapegituotkpb.pdfIn PDF document text
    • https://bupifepubeweta.weebly.com/uploads/1/3/4/3/134336259/9de0b0.pdfIn PDF document text
    • http://rasezinetoge.iblogger.org/blank_world_map_with_country_names.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/muhaBFD/viticulture_and_enology_degree_australia.pdfIn PDF document text
    • http://vuvowepo.22web.org/59831892060.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gixulomo.rf.gd/75796109780.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/dance_studio_gift_certificate_template.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_off0001230f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1230F 5180 bytes
SHA-256: df3e4734798142a2927b14409b8bd14063a23d761b55fa94adff659ca260b5b4
font_01_sfnt_off0001349e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1349E 10756 bytes
SHA-256: 1086ddea9adb9e53c6df5dd50046802c0d0e5762633f0b0cbe5c73c9a3d2ff17