Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4421bab925e0166…

MALICIOUS

PDF

75.5 KB Created: 2021-03-13 22:15:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 68188948e86ae925c5cf20e5ef958166 SHA-1: 9a0ebb310dbe358e97cf45b68a90f288ebc997a4 SHA-256: c4421bab925e0166eb77a25cfd7d4b82c7d0d3755fb4f819a8ab7e8595e1439f
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 0.9997

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 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://crophysi.ru/wix?keyword=trius+one+step+trap+thrower PDF link annotation
    • https://cdn.sqhk.co/koxajavu/cgchdig/ps4_remote_play_laptop.pdfIn PDF document text
    • http://fakexexu.sportsontheweb.net/biblia_reina_valera_1960_letra_grande_online.pdfIn PDF document text
    • http://zakosemej.mypressonline.com/what_does_college_and_career_readiness_mean.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/aGihphS/final_fantasy_7_original.pdfIn PDF document text
    • https://cdn.sqhk.co/zipodumup/ajbhdji/vce_file_convert_to_online.pdfIn PDF document text
    • https://cdn.sqhk.co/vefuwatak/7idjbXm/jomusir.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/pirogafa.pdfIn PDF document text
    • https://cdn.sqhk.co/falugojafat/dipEhiH/45502781357.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xemigososefof.atwebpages.com/gidejofopu.pdfIn PDF document text
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_78233402a73e4f1d99b8f9ea3561b4de.pdf?index=trueIn PDF document text
    • http://pigibotokaper.epizy.com/ralavipozitemenekuzew.pdfIn PDF document text
    • https://34ec465e-51aa-4dba-9a8c-c05fcfb5ae84.filesusr.com/ugd/df15ee_e7ced7f3489f45b0bd075daf0997abee.pdf?index=trueIn PDF document text
    • http://vubefezit.rf.gd/45689686455.pdfIn PDF document text
    • https://72cee60b-533f-4fda-9f40-87b1bb6f0553.filesusr.com/ugd/590778_942372768df3443fa478047f816521f6.pdf?index=trueIn PDF document text
    • http://furunes.onlinewebshop.net/ejercicios_para_ataxia_cerebelosa.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/11708165797.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/pimanobaxejane.pdfIn PDF document text
    • http://julifoz.epizy.com/28416708957.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/new_testament_central_city_church_milwaukee.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/free_bridal_shower_invitation_templates_for_publisher.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB08 4796 bytes
SHA-256: 25e0bb48a53c92364ab2772579ee7ac9b4784bb0cd47f5537f6a5fd3951880cb
font_01_sfnt_off0000eb57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB57 11196 bytes
SHA-256: 9f65b29d9b84574c7aaf10349f16d8137d30c209df3903dee1b3609031665da0
font_02_sfnt_off00011164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11164 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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