Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d67f8cc8599e136…

MALICIOUS

PDF

79.0 KB Created: 2021-03-29 14:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: bfb9f68e8ce38180b714209e0f49271f SHA-1: c10df1c355f8720111548aa1f0562baa3872dc23 SHA-256: 8d67f8cc8599e136da8e0ce4e946f75cef79bc17f7c6275883cb7d650e73511e
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to drive traffic or distribute further payloads. The primary external URI points to a URL that appears to be a lure for cracked software, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://zajinet.ru/wix?keyword=2020+kitchen+design+download+cracked PDF link annotation
    • https://cdn.sqhk.co/pirasemofoge/rgjdNjg/28608892767.pdfIn PDF document text
    • https://mabamigetope.weebly.com/uploads/1/3/4/4/134493328/lezosigexedo-zufixizufo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443619/normal_600c229622545.pdfIn PDF document text
    • http://wekanisa.scienceontheweb.net/luvutogazexagon.pdfIn PDF document text
    • http://dapovevi.mywebcommunity.org/26444047944.pdfIn PDF document text
    • http://rarubife.mygamesonline.org/ruxifilagivunule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481157/normal_5fe8ba188df70.pdfIn PDF document text
    • https://cdn.sqhk.co/pugepavofu/iih9uge/best_2020_4k_tv_for_gaming.pdfIn PDF document text
    • https://fuzipoxo.weebly.com/uploads/1/3/0/8/130873840/6660332.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374519/normal_5fee819a6f57d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384471/normal_5fe7616d83544.pdfIn PDF document text
    • https://bewepuxajijasi.weebly.com/uploads/1/3/4/3/134362307/f99c349efa52b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421637/normal_601df94d7607a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3b9c8e93-52ab-41e8-96f8-e5fc639bf6fa.filesusr.com/ugd/fe3ccd_07aac9c780a14905a6b441c4381c6630.pdf?index=trueIn PDF document text
    • https://832c8a8d-f05d-46e3-9166-97d9de82ace4.filesusr.com/ugd/432509_4c5bacd43e054cbf975ffab60edf2d84.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/power_system_engineering_book.pdfIn PDF document text
    • https://d787a32c-196b-4e99-9c98-3ae3c28023f9.filesusr.com/ugd/05b469_2efdb6b4b3c94bb49c6bb7045bbde2c5.pdf?index=trueIn PDF document text
    • https://81da36f4-dec6-4bf4-836b-19ed67500659.filesusr.com/ugd/5fd5c1_7b0c51a4ba7640a8984f43173a1366a3.pdf?index=trueIn PDF document text
    • https://4fdc5cb1-0646-4ed0-9ac1-f9332ff2c333.filesusr.com/ugd/9b9480_6974ffd1ea67405cbeb61964a3010d57.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/44285091721.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/email_information_commissioner_s_office.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/zurotarexobu.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_off0000f426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF426 5536 bytes
SHA-256: 29b007d64fc4477f7dee3b57b0cd0ac0c4ee87647e3e5b6a2a41959073fc51cb
font_01_sfnt_off00010704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10704 11868 bytes
SHA-256: 96d5001eafb1c177cfa1489d4eda18de0675c99548db42a0b24ab52219a40cba