Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c0ae14e7b6199f6…

MALICIOUS

PDF

77.5 KB Created: 2021-01-17 04:27:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3c5e3b5d87916571f92383f1f116a5ea SHA-1: 2d29927923157d905db316b37ba387ec1c92a83e SHA-256: 7c0ae14e7b6199f6dc678baed0b4478a505ff37b6a37251cd7ab903e047f98f2
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable domains and redirectors, indicating a link farm or SEO manipulation tactic. The presence of a malicious redirector URL and the ML classifier's high confidence score suggest this document is designed to lead users to malicious content or phishing sites. The ClamAV detection further supports its malicious nature.

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://traffmen.ru/123?utm_term=rune+mysteries+guide+rs3 In PDF document text
    • https://rutaluxunenore.weebly.com/uploads/1/3/0/7/130740368/kubunesu_pudufonepowefi.pdfIn PDF document text
    • https://wagizubim.weebly.com/uploads/1/3/4/4/134470033/kupemaguke-tuvomus.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/xosabata.pdfIn PDF document text
    • https://giburonolunege.weebly.com/uploads/1/3/1/4/131406036/dabomotadusijig.pdfIn PDF document text
    • https://nolutoxut.weebly.com/uploads/1/3/4/6/134683805/vesekimeraruzan-nigawofamufota-muvigodup-kulimi.pdfIn PDF document text
    • https://febukorev.weebly.com/uploads/1/3/4/3/134325382/1f97e127f.pdfIn PDF document text
    • https://loxazofobel.weebly.com/uploads/1/3/4/2/134265844/jotitatedebugajufim.pdfIn PDF document text
    • https://lawilutimi.weebly.com/uploads/1/3/4/8/134879912/1782609.pdfIn PDF document text
    • https://joleziravakejar.weebly.com/uploads/1/3/4/4/134460301/7c433054.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390681/normal_5fb81d10b8537.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://s3.amazonaws.com/jamokaroxoj/mavifelamebejit.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_off0000e7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C0 4948 bytes
SHA-256: 746fb235e6a880de1c228a6130d08a4eaa85d3555c760a90e0b4035c21467235
font_01_sfnt_off0000f885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF885 10376 bytes
SHA-256: 3e9f5d9dd51a6d900ba4469c05892243fda7f85679083cda589891d9bc150329
font_02_sfnt_off00011bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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