Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf70fb6bbfd4fb76…

MALICIOUS

PDF

82.5 KB Created: 2021-03-28 01:24:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ae71bba990082c5c26b0c9e61890d79e SHA-1: 8b1568daee95544b88daffeab597eae21dedb4ac SHA-256: bf70fb6bbfd4fb76424792b719e30651de4ce243b97fa7bcf4d914978efd8a14
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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-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://dugedepap.ru/strik?utm_term=what+happens+if+i+die+today PDF link annotation
    • https://cdn.sqhk.co/lobinazema/c26icy2/pocket_edition_servers_2019.pdfIn PDF document text
    • http://nunupefaz.iblogger.org/pikowafaxalifezatavep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458125/normal_5ffba08c26df4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388412/normal_603ed6f233871.pdfIn PDF document text
    • https://cdn.sqhk.co/rurokusulos/hwidjbi/subwoofer_bass_test_rap_hip_hop.pdfIn PDF document text
    • http://saxefitipar.iblogger.org/69272874350.pdfIn PDF document text
    • https://cdn.sqhk.co/ribafesupuro/hgBhiQr/reversibility_psychology_defined.pdfIn PDF document text
    • https://cdn.sqhk.co/dedomafub/fgjHk0h/88968141383.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501037/normal_602fa6fe0af52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492897/normal_5fdf272998c8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415951/normal_5fce40d9b1da0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481999/normal_5fe0671431a75.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484169/normal_5feda1e22ec8e.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
    • https://b9ecad59-ee1c-469f-8402-ddbad3bf215f.filesusr.com/ugd/84dab8_b873028c8a7042e2bf37bbd331eb91a5.pdf?index=trueIn PDF document text
    • https://d572dbd6-ec42-402e-884a-3db6daac2318.filesusr.com/ugd/6a558d_de082f68063047f88fe6cd9b8e8dcb54.pdf?index=trueIn PDF document text
    • http://jawigunomuj.epizy.com/511._1_case_study_of_a_child_in_english.pdfIn PDF document text
    • http://videwebik.epizy.com/zegepek.pdfIn PDF document text
    • https://6cdb29d4-22ce-4aaf-9e51-562b59d50851.filesusr.com/ugd/1b20fb_6c1a1182d00244ba984ac0fdb55fcf6b.pdf?index=trueIn PDF document text
    • http://bosurigazo.epizy.com/burmester_theory.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF703 4904 bytes
SHA-256: 11ddb7ad1ed863188afe043813b75aff904d7a8408626a2485809885d5639b41
font_01_sfnt_off000107c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C0 11060 bytes
SHA-256: 1e5543b8e84916366ead890b3bb1b24f7e548a823ab430ef0eff9f25eab6b8ed
font_02_sfnt_off00012d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D43 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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