Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9e0f48a094e9879…

MALICIOUS

PDF

81.5 KB Created: 2021-02-17 14:47:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9f36fa4d1751a1d02c272b3274ac639c SHA-1: 38557d8cdb03e0fd3cde01339a01947c7e38e289 SHA-256: e9e0f48a094e9879f0a88363c5a6d34b586e995b46dea3a590997d975663e30e
244 Risk Score

Malware Insights

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

This PDF was flagged by multiple critical heuristics as a malicious redirector and link farm. The embedded links, such as 'https://crophysi.ru/wix?keyword=cataclysm+tailoring+guide+1-525', likely serve as lures to direct users to malicious websites. The ML classifier and ClamAV detection further support its malicious nature, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/wix?keyword=cataclysm+tailoring+guide+1-525 In PDF document text
    • https://cdn.sqhk.co/zenetofuma/hgnhbmw/57157434745.pdfIn PDF document text
    • https://cdn.sqhk.co/pulununese/heMjjwW/40019889941.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/jaCjgjd/pearl_price_in_hyderabad.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/gdthhQX/define_pog_in_gaming.pdfIn PDF document text
    • https://lekozeva.weebly.com/uploads/1/3/5/9/135964777/borup-momirale.pdfIn PDF document text
    • https://cdn.sqhk.co/nerutamar/jgMjcih/crunchyroll_games_mass_for_the_dead.pdfIn PDF document text
    • https://misadedami.weebly.com/uploads/1/3/3/9/133997414/2da713.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496151/normal_600d12d2bee01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410953/normal_5fe5d21a9c083.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/Y9Xhchj/46345031054.pdfIn PDF document text
    • https://wigitofeza.weebly.com/uploads/1/3/2/6/132682623/pizowikuxi.pdfIn PDF document text
    • https://cdn.sqhk.co/livatunozasu/cjtgcgh/75809995657.pdfIn PDF document text
    • https://kenemujawov.weebly.com/uploads/1/3/4/6/134645985/6400111.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/RIbFibr/learn_thai_from_a_white_guy.pdfIn PDF document text
    • https://gupufema.weebly.com/uploads/1/3/4/4/134456882/lininunodekida.pdfIn PDF document text
    • https://cdn.sqhk.co/vumorumuvogi/LoW6hi8/gusupabupaxas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/warlock_multiclass_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/best_bed_sheet_company_in_india.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81C 5608 bytes
SHA-256: 811787c168c125e6ff6efec366fcbe2aae2e37da36ecc6d9f95953d27d11cbe2
font_01_sfnt_off00010b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2B 14844 bytes
SHA-256: c4df6e88b306fda003045dd4d7d7832dc70fdece79909744dcf97742a55b0002

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