Malicious PDF — malware analysis report

Static analysis result for SHA-256 05fd9157ec6ce96c…

MALICIOUS

PDF

74.3 KB Created: 2021-03-09 07:52:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 6e26ed9a63f39736993b6ee27deb84a7 SHA-1: 2e34b7fcd2b0f0e8de87344158d5799a254b1f64 SHA-256: 05fd9157ec6ce96c133cd75bba031c8edb70cc67357b209bd297044a457ef4f2
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, which is characteristic of a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and extensive link farm suggest it's designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://fokemale.ru/123?utm_term=elastic+fitted+bed+sheet+king+size PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4497348/normal_5fcd61b9837dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451205/normal_603556996b3fb.pdfIn PDF document text
    • http://cashtanks.fun/pengertian_platform_menurut_para_ahli44gyi.pdfIn PDF document text
    • https://janilunulosuga.weebly.com/uploads/1/3/0/7/130739392/memuwumumufa.pdfIn PDF document text
    • https://polokoxukoneg.weebly.com/uploads/1/3/2/8/132816042/ba554d.pdfIn PDF document text
    • https://dajoromu.weebly.com/uploads/1/3/4/3/134309711/vakezab.pdfIn PDF document text
    • https://wamibujobaju.weebly.com/uploads/1/3/4/7/134716207/lagejesej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411932/normal_5fcea2601e888.pdfIn PDF document text
    • http://blue-tick-central.com/513177897078udpx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458163/normal_5fcd256caaab9.pdfIn PDF document text
    • http://antileqphh.site/49236077805yvmjm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470689/normal_5fffa3056ba1b.pdfIn PDF document text
    • http://blognews.top/weekender_bag_with_shoe_compartment_canadadsmg9.pdfIn PDF document text
    • https://kulovuvakaj.weebly.com/uploads/1/3/4/5/134515365/puretejuzizedi.pdfIn PDF document text
    • https://timurikamaz.weebly.com/uploads/1/3/1/4/131406182/5262922.pdfIn PDF document text
    • https://bisojobiregabo.weebly.com/uploads/1/3/4/5/134509607/7417752.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0503187d-52cd-4237-9521-a3cb9bf551ae.filesusr.com/ugd/5bb01c_4dbde0dfbe6e41f3a6ffbe0f97b46683.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/461ffdf0-73ba-4dd6-b276-51afe19d920c/whirlpool_gold_quiet_partner_iv_control_board.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/620dde3c-18b3-4be4-b489-8e6486dfc002/true_freedom_for_music_hbs-730_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfe6ab65-07cb-4d92-b536-77a3b012a902/harrisons_manual_of_medicine_20th_edition_ebook.pdfIn PDF document text
    • https://161abad2-7de2-49bb-9904-d6e2a620a662.filesusr.com/ugd/2eec94_b1e646aaf61248dca0085642414cb5b7.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_off0000e4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A6 5396 bytes
SHA-256: b1acf2e2a14cc31d2438b772d761333d60ec00dcce6cd3ddedf1aa6b17725794
font_01_sfnt_off0000f70b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70B 10708 bytes
SHA-256: a8b4965d43feb2c7a22e8c700fef535bf418d101d4231e6e458d238e79a17f7a