Malicious PDF — malware analysis report

Static analysis result for SHA-256 fea9e61dc158315b…

MALICIOUS

PDF

76.4 KB Created: 2021-02-24 14:14:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1d0c2cf022c08ec7df829b459152ef48 SHA-1: 5da6966d110a7bf772505ea4003612e723aead3a SHA-256: fea9e61dc158315bc2f560d28c605a92a371e4ee8cea71f039c09f5418b376a5
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or scamming purposes. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 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://yafferge.ru/wix?keyword=comfortbilt+pellet+stove+hp22+parts In PDF document text
    • https://static.s123-cdn-static.com/uploads/4472793/normal_5fe17e092f27e.pdfIn PDF document text
    • https://vugifalufaduzo.weebly.com/uploads/1/3/4/8/134889855/kegemerumusokuvex.pdfIn PDF document text
    • http://serdyukov.pro/xejubetofixunuluwz7zkq.pdfIn PDF document text
    • https://cdn.sqhk.co/samivegin/hh7jbX7/98757117961.pdfIn PDF document text
    • https://fujareke.weebly.com/uploads/1/3/5/3/135391043/20f79.pdfIn PDF document text
    • http://lazerepil.site/zupos8s3lk.pdfIn PDF document text
    • https://pejifote.weebly.com/uploads/1/3/5/3/135348690/vaketizidekam.pdfIn PDF document text
    • http://pannochki-art.com/free_text_message_stickers_for_android9bgnv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492586/normal_60335fffb1c97.pdfIn PDF document text
    • https://rejukikigukaw.weebly.com/uploads/1/3/5/3/135387704/0e6d46e5c.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/fogibi/performance_appraisal_sales_personnel.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/40883136990.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/jaximakuzugizaxiwaze.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/gozeparatupifofi.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/44931744166.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_off0000ee5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5C 5380 bytes
SHA-256: 109bc6fe3c39279fe3fcf455aa0d5430178584a90a49ab831f4bd41cb0207d20
font_01_sfnt_off00010077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10077 10596 bytes
SHA-256: a46ee60b2b5de8797e15082748d1b410724912fa89a58c57e24e552ccab58f0c

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