Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d8ee5e9c786c134…

MALICIOUS

PDF

81.1 KB Created: 2021-03-30 14:31:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0c410c1e2c74926a582a0e0388c38073 SHA-1: 90bcb8fc133266a9eae7fb157523f06abf7f0f5e SHA-256: 2d8ee5e9c786c1341770e47f65dcb56d0db86933c29d7ba1347f1b2a29223be4
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The primary malicious URL identified is https://maypoin.ru/strik, which is likely used to redirect users to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://maypoin.ru/strik?utm_term=can+you+lay+concrete+in+freezing+weather PDF link annotation
    • http://xukosususif.medianewsonline.com/komepedovuzejizujulubosi.pdfIn PDF document text
    • https://loribipusav.weebly.com/uploads/1/3/1/3/131379532/91c1c2.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/scott_pilgrim_castle.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416810/normal_600e44d2ab0ce.pdfIn PDF document text
    • https://poximixej.weebly.com/uploads/1/3/0/7/130776069/zewowi-zukunen-pefusek-xalaridadezajej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454973/normal_5fcb4979ca33f.pdfIn PDF document text
    • http://fupuwage.22web.org/uk_border_agency_appendix_7_form.pdfIn PDF document text
    • http://dotixomovi.sportsontheweb.net/materi_alkali_tanah.pdfIn PDF document text
    • https://sotasoniwolog.weebly.com/uploads/1/3/1/6/131637806/9600412.pdfIn PDF document text
    • https://xazonulukobimov.weebly.com/uploads/1/3/2/7/132712199/06f526309a9d02.pdfIn PDF document text
    • https://sibozigoguxo.weebly.com/uploads/1/3/0/9/130969143/kovelitezajoxupela.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://fb413987-6e77-4bf1-aaa6-e97eb550fbee.filesusr.com/ugd/108936_6f719d81d98c452a9257caae52c42034.pdf?index=trueIn PDF document text
    • https://d0fd53c2-66a5-49f7-a942-a4bfc50892a3.filesusr.com/ugd/11baf9_c7eb5ffa75384f17a24083958e51dda1.pdf?index=trueIn PDF document text
    • http://dejoxatumiki.rf.gd/be_brave_little_penguin.pdfIn PDF document text
    • https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_686659c6945d48b082958cac2d43ba7e.pdf?index=trueIn PDF document text
    • http://morisexisaxewa.epizy.com/zovimu.pdfIn PDF document text
    • https://68358877-4ee6-4e53-94f7-4bd9665c1f53.filesusr.com/ugd/3bbd68_ed599af73c2d47518ae4e98a61d28252.pdf?index=trueIn PDF document text
    • http://xazikipigenuvi.rf.gd/focusrite_scarlett_18i20_review.pdfIn PDF document text
    • https://aa6d2f86-95e2-42cc-897e-6bbd71c3a116.filesusr.com/ugd/78daac_8931304e59264a6aa98022cab9cca544.pdf?index=trueIn PDF document text
    • https://068ba8bc-08b0-4b68-8151-f3c59c7a5775.filesusr.com/ugd/5a4aad_c6e9784bc5014ad689d21c3c0c2bc646.pdf?index=trueIn PDF document text
    • https://1a441fb4-51dd-4528-a053-eb59ff664e18.filesusr.com/ugd/43d9d5_efb6227fbec84d0e971ea4ed406ba5cb.pdf?index=trueIn PDF document text
    • https://148d48ef-a78d-4e34-a4d2-755cfbac042a.filesusr.com/ugd/ccca9b_bdd906cebba642f882c163bc0c3afada.pdf?index=trueIn PDF document text
    • https://b2f02272-107b-4032-aafc-54cdd6265a16.filesusr.com/ugd/6cf392_cfd3c98dd91c4194af245911a58e0388.pdf?index=trueIn PDF document text
    • https://0bef8565-087b-457a-960c-b0529baba50c.filesusr.com/ugd/638000_3eb520667d5b4230a6f6ab8b1b40ea75.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A8 5112 bytes
SHA-256: b67c8d70194c043ecc4719f0dcdd0539c114df6824edf4890d85eb9bdbd40637
font_01_sfnt_off00010434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10434 10628 bytes
SHA-256: db1fab6c78b117f49331c7ea96bcd1b5b3b1e84b7f6b2a37643c7e649ce1c107
font_02_sfnt_off000128a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A0 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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