Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c7e534680ef398…

MALICIOUS

PDF

76.8 KB Created: 2021-03-17 22:57:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e5380acd035a624ea2768734fb19ab13 SHA-1: 9ffd7fbb6aca88c33aa05d3b00434fa7165d7413 SHA-256: e7c7e534680ef3981d6a46d0053717eb8ed9f9d17fd21becbef382843b440f79
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 0.9993

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://kuzutuzo.ru/123?utm_term=vidmate++karna+chahte+hain PDF link annotation
    • http://itash.space/befodevivuluzisabomazipomel4g1.pdfIn PDF document text
    • http://webmastervlad.ru/jogusodinezajaguritolend9.pdfIn PDF document text
    • http://4kuhd.me/77380232831a95f9.pdfIn PDF document text
    • https://cdn.sqhk.co/vefoveted/DghZjiM/lexedoguzirobawo.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/how_to_use_bloxburg_speakers.pdfIn PDF document text
    • https://cdn.sqhk.co/godezixibufo/gfjXhgc/58374118929.pdfIn PDF document text
    • http://cheapkeys.site/rrb_chennai_ntpc_notification_2019_download0u5iy.pdfIn PDF document text
    • https://limisakaxenit.weebly.com/uploads/1/3/4/3/134371081/fegupelidabo_nomujezun_kaniw.pdfIn PDF document text
    • https://cdn.sqhk.co/dabeluza/THPhcjc/smackdown_wwe_wallpaper_new_title.pdfIn PDF document text
    • https://cdn.sqhk.co/kinifukix/fOlohf4/starcraft_vinyl_hd.pdfIn PDF document text
    • https://molesomux.weebly.com/uploads/1/3/2/6/132681378/7684499.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/harlem_by_langston_hughes_poem.pdfIn PDF document text
    • http://apeech.ru/16671861470n3v4o.pdfIn PDF document text
    • http://rat-red.space/what_is_error_code_32007_on_wiiuncl7.pdfIn PDF document text
    • http://italystore.pro/sex_and_the_city_2_cast_drama8ki1q.pdfIn PDF document text
    • http://loveantravel.xyz/tivimk23jj.pdfIn PDF document text
    • http://sodalabs.club/lagujimapozuvupisihsarl.pdfIn PDF document text
    • https://bativizamazon.weebly.com/uploads/1/3/4/7/134770744/bea4fb6d3b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fa202315-5cd5-4006-9a99-7c5d4406650e.filesusr.com/ugd/61804c_05ac0dd2ebf84649910e3c4357fc87e4.pdf?index=trueIn PDF document text
    • https://1b15a19f-c8c2-4d9d-8c2f-e97aa7ecfe2c.filesusr.com/ugd/eb6c48_e34edab0b3834bb78aae61df91e7db02.pdf?index=trueIn PDF document text
    • https://f495c71d-628d-4070-9a3d-b699cbb46ba4.filesusr.com/ugd/d99ef3_ff51c09076c94aeaab75edfe62185e08.pdf?index=trueIn PDF document text
    • https://84bd2c60-91d0-47b6-9565-6ae8a6593e58.filesusr.com/ugd/963627_4b62d157d7544eb9a9bc7e66ef212786.pdf?index=trueIn PDF document text
    • https://67258aaf-84c5-4a88-bfd2-1aa7ddb6c27a.filesusr.com/ugd/850f07_056fd966763c477ea9a713d25ad5ddd1.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_off0000f2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A0 4996 bytes
SHA-256: 985b0e224de2f4e021592ee5f45684db6b6672c8dd22f7b3d6386f34569ffb58
font_01_sfnt_off00010374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10374 10180 bytes
SHA-256: d7adc8bebb47f07e4465f9e233c5efc5c35b684b8036549224b2a38d676aa026

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