Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d9fcc5086a7de41…

MALICIOUS

PDF

77.7 KB Created: 2021-03-02 12:28:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 44d7f3c02aa97f10340b72efb346880c SHA-1: 2c5e76d0b1ce0a321ba8024469bbd8ca50c75b9b SHA-256: 0d9fcc5086a7de4193d89587464b2303d847d4e3e1c37da99a8deae4e4f86153
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains a significant number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the primary URLs, 'https://fokemale.ru/strik?utm_term=royal+caribbean+drink+package+reviews+2019', appears to be a redirector, likely leading to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/strik?utm_term=royal+caribbean+drink+package+reviews+2019 PDF link annotation
    • https://cdn.sqhk.co/kebokeregim/q6jjsdd/zubibiviwisasi.pdfIn PDF document text
    • https://cdn.sqhk.co/polidupokasu/FzgcBjh/kuremuvafiwofuxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384647/normal_60317bff222e9.pdfIn PDF document text
    • https://kowedeta.weebly.com/uploads/1/3/0/7/130775164/bererax_maxugivegab.pdfIn PDF document text
    • https://cdn.sqhk.co/tobepeliv/fYif2a9/drill_master_heat_gun_price.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409114/normal_5fe5a1d4a2d1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374374/normal_5fe5b38e8c470.pdfIn PDF document text
    • https://cdn.sqhk.co/nivavepe/ibSEmZ0/timanok.pdfIn PDF document text
    • http://lowadikewafuber.iblogger.org/ririwidexite.pdfIn PDF document text
    • https://cdn.sqhk.co/tovisegag/jciegfg/83028202636.pdfIn PDF document text
    • http://fubesewokelo.22web.org/81289358184.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luvoxijamubisur.rf.gd/jiu_jitsu_moves_youtube.pdfIn PDF document text
    • http://wavanak.epizy.com/98753784867.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_off0000ed65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED65 6188 bytes
SHA-256: eaad6eb261a91e3dd1bdf2460c6a4fbe8e078d7da1000c4b10e64a8bd2d569ee
font_01_sfnt_off0001029d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029D 12028 bytes
SHA-256: 5410a9cd21480594f4eb478372bca184f640ee0bd7f2230e326d5b449517c034

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