Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9bd05b8272cdf7e…

MALICIOUS

PDF

80.5 KB Created: 2021-03-13 21:58:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 27f121bb5d646472b3a5f418d3555932 SHA-1: 1ed31da8e0b7e6c672ecbfb5dd3d749af2d8f3fe SHA-256: f9bd05b8272cdf7e67c4da750adc69229e06a932179674831cafa6b96c878fbf
244 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or malware distribution campaign. It contains a large number of embedded links, with at least one identified as a redirector to known malicious infrastructure. The document also leverages disposable hosting and a link farm strategy, suggesting an attempt to obscure the final malicious destination. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=kenmore+bread+maker+reviews In PDF document text
    • https://cdn.sqhk.co/kigowabalo/4dQgcih/85246808588.pdfIn PDF document text
    • https://cdn.sqhk.co/vijukifezu/eigigji/36975357425.pdfIn PDF document text
    • https://cdn.sqhk.co/bafiweba/ehaggja/social_media_marketing_plan_example.pdfIn PDF document text
    • https://xirozakopep.weebly.com/uploads/1/3/4/7/134719339/doxamoluzum.pdfIn PDF document text
    • https://tofabefanij.weebly.com/uploads/1/3/4/7/134726630/6689fae916f193e.pdfIn PDF document text
    • http://nutristrike-shop.ru/dragon_age_origins_mage_skills_guideq1lyz.pdfIn PDF document text
    • https://guxedujigizos.weebly.com/uploads/1/3/4/7/134735137/mukilisikokopefekana.pdfIn PDF document text
    • https://foxujutuz.weebly.com/uploads/1/3/4/3/134348357/65ce1fd7509daaf.pdfIn PDF document text
    • https://katozela.weebly.com/uploads/1/3/0/8/130874493/xoruvuva-vagozefew-guresen.pdfIn PDF document text
    • https://nazewaraja.weebly.com/uploads/1/3/5/9/135959380/nojujunup_lelepame_gemujamubis_bamiwepo.pdfIn PDF document text
    • https://gubuwogufulero.weebly.com/uploads/1/3/4/6/134608521/7509160.pdfIn PDF document text
    • http://jowovuda.22web.org/sapazokivoderuvetawu.pdfIn PDF document text
    • http://trynutra.shop/55898541296p3wbz.pdfIn PDF document text
    • http://zojulosopejozaz.iblogger.org/35464996628.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_11c9e961faef463f8743c88bc7141bb3.pdf?index=trueIn PDF document text
    • https://47c0d0ed-94e3-447f-940a-e265262d053f.filesusr.com/ugd/a43ec6_64863aa3236e49bc8c70583380df9cf0.pdf?index=trueIn PDF document text
    • https://84d51d8d-5932-465a-b044-5d36dace581c.filesusr.com/ugd/98e2de_87e35fc359cd4100b4e5a3816394b690.pdf?index=trueIn PDF document text
    • http://mupufuten.epizy.com/laserevonapunoju.pdfIn PDF document text
    • http://giwofigu.epizy.com/waveguide_dispersion_in_optical_fibre.pdfIn PDF document text
    • https://8b2103c5-345b-48fd-98e3-f19c90c4efd0.filesusr.com/ugd/0e2875_1d5c7d9387c7434fb151f89836335176.pdf?index=trueIn PDF document text
    • http://pirefalanife.epizy.com/sazazajuma.pdfIn PDF document text
    • https://fa90eb46-aa9b-4fd1-a2e8-e903ec8e50a4.filesusr.com/ugd/575fb0_52f877017c8c4e5892aaa163d53c6f63.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_off0000fde2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE2 5264 bytes
SHA-256: 382b64e1a94e5c71dc8947fc7d06993aa02801f4969c3da1ee2fedc017e0ad8e
font_01_sfnt_off00010fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC1 10432 bytes
SHA-256: 041913e332b2c733023bf8673ab60a85ad9aa9e4f3021ddc140073538ddecfc9

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