Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7a146e24dcc0979…

MALICIOUS

PDF

76.8 KB Created: 2021-03-03 03:39:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e45f1914f4847f40888e11fc3a836feb SHA-1: e96688384b62e1dbe67bd2d5f4592de78bd014ff SHA-256: b7a146e24dcc0979e70b8a850c7fc1d5860c24e4100c9862b513596b2c9562ad
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://lozipotod.ru/wix?keyword=islam+empire+of+faith+part+3+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/fipimomozuk/gdOiahO/kezetutikogigolududozidu.pdfIn PDF document text
    • http://kowojolajamuv.getenjoyment.net/dunkin_donuts_blueberry_munchkin_recipe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415065/normal_5fd6675a01117.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/jf7jcje/kumopofewalamopijopavox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449622/normal_5fcbac6b0ce62.pdfIn PDF document text
    • http://palaxofivuleduj.medianewsonline.com/weber_spirit_210_vs_215.pdfIn PDF document text
    • http://kalidejomepajo.scienceontheweb.net/10_day_smoothie_challenge_recipes.pdfIn PDF document text
    • https://cdn.sqhk.co/sazobenapur/6ggVE3Y/jumijivuguxipakadip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421983/normal_6029586c337c7.pdfIn PDF document text
    • http://mebovedu.getenjoyment.net/lifevaraxu.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/3ib99hh/the_cult_of_chucky_review.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
    • http://ruraduwajisiv.rf.gd/dyson_dc59_motorhead_replacement.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30E 5184 bytes
SHA-256: ff377ef607e7dab419b7367b9cd2055ed7bb73da041f78038fba9449f9517c38
font_01_sfnt_off0000f48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48A 10228 bytes
SHA-256: 59d4e20634b892722aa35fa6082f85afe896065e824b4e1d42bcc90ad69c621b
font_02_sfnt_off0001178e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1178E 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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