Malicious PDF — malware analysis report

Static analysis result for SHA-256 3513791b3b101da7…

MALICIOUS

PDF

65.4 KB Created: 2021-02-24 01:25:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 3793b8f12377c287f8903ac17e5349f5 SHA-1: 0d1cfb761ee99a662d3f398dac92925d36f5a6a9 SHA-256: 3513791b3b101da7d0bf72e3e53148299feef423f62e46ccd18789b3749cfc05
244 Risk Score

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://yafferge.ru/wix?keyword=kobalt+miter+saw+parts In PDF document text
    • https://lalevajapogos.weebly.com/uploads/1/3/0/8/130874146/b73ffa38d4884b.pdfIn PDF document text
    • https://porujeworor.weebly.com/uploads/1/3/2/8/132814718/vorati-beduninakokakov-midilapa-potal.pdfIn PDF document text
    • https://busuguzokiw.weebly.com/uploads/1/3/1/4/131406797/wafojuvojedufigukuf.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/jUhciiG/video_editor_salary_texas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369633/normal_5ffdb7f1ab6ae.pdfIn PDF document text
    • https://cdn.sqhk.co/satijumok/ji3zdjh/dexopovepiziwuzutoze.pdfIn PDF document text
    • https://fimosezit.weebly.com/uploads/1/3/0/7/130775491/gedojaritadokiz_ruxazonaniv_kakewumasexo.pdfIn PDF document text
    • https://dolibaradodusop.weebly.com/uploads/1/3/4/5/134595809/053deb6fe165e6.pdfIn PDF document text
    • https://cdn.sqhk.co/geruxibab/hk5j7T1/fogozarizejejonodemer.pdfIn PDF document text
    • https://gamabisage.weebly.com/uploads/1/3/2/6/132681080/ec5c2e.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/itgjgi1/74919453062.pdfIn PDF document text
    • https://kedumapeba.weebly.com/uploads/1/3/4/5/134593926/moleje.pdfIn PDF document text
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/pabuxeva.pdfIn PDF document text
    • https://kuxelozipapim.weebly.com/uploads/1/3/1/8/131871637/fe5c24ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC621 5168 bytes
SHA-256: d214f848821ae9afd5b7b5a2cb149f546dbc3a30a360a9f25c36073bb6540876
font_01_sfnt_off0000d7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AD 9876 bytes
SHA-256: 909f592d5df543cecb842c641d0b663da45485a6ae1ae73657b0efab7beedb99

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