Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e9d9a75cdf45c7d…

MALICIOUS

PDF

84.3 KB Created: 2021-03-27 10:14:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6d653b47679a40f0947a00991bc9ca02 SHA-1: 7a3ab236a0f24588f02d9d82fcb1bc9d2cf17b75 SHA-256: 9e9d9a75cdf45c7d77ff8133851fe17922ca0b5e11de2f3eb8c51e6267159227
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, indicating a link farm designed for SEO manipulation or phishing. The primary URL, https://maypoin.ru/award?keyword=ssc+nic+in+mts+result+2020+pdf+download, suggests a lure related to search results. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly suggest a malicious intent to redirect users to potentially harmful content.

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://maypoin.ru/award?keyword=ssc+nic+in+mts+result+2020+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454813/normal_6022c0fbaa18b.pdfIn PDF document text
    • https://tulugawaluga.weebly.com/uploads/1/3/0/9/130969515/numuvelifini.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408587/normal_605037ac96a24.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387816/normal_5ff791a0402a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393759/normal_605576578024a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369920/normal_5ff0cac7863ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495558/normal_5fdbb424951c3.pdfIn PDF document text
    • https://cdn.sqhk.co/xozawimepod/LyKhjs8/10615489769.pdfIn PDF document text
    • https://tesujirigagorin.weebly.com/uploads/1/3/4/8/134869290/a726de54aa098.pdfIn PDF document text
    • http://jirenaxapibetig.scienceontheweb.net/jifiwu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391621/normal_5fff3ff4eb69f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421637/normal_5fe1fc34a9e1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459028/normal_600dc57230900.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/nicaragua_vs_us_case.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/iIsjhCu/rokizosadago.pdfIn PDF document text
    • https://xepuvuvapo.weebly.com/uploads/1/3/4/6/134603714/2137466.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426813/normal_6057114f39d92.pdfIn PDF document text
    • https://cdn.sqhk.co/gidulikegel/hOxjaei/erebus_god_of_darkness_symbol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380403/normal_5fddcbeed9a0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391925/normal_6018e66f4058e.pdfIn PDF document text
    • http://fafuzum.sportsontheweb.net/42588704890.pdfIn PDF document text
    • https://tizatikunokoxul.weebly.com/uploads/1/3/1/0/131070767/b345ec5a830.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000108f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F2 5772 bytes
SHA-256: 94409f14961f92f3afea72c78363de5f5c85c1cd4ee5c38e17694ab6b15b3286
font_01_sfnt_off00011c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8E 11484 bytes
SHA-256: 96a7484ec46a11c4d3cd94e36fbfe02702fbdb128eb9d8e50738dab1248ae183