Malicious PDF — malware analysis report

Static analysis result for SHA-256 d10597049ce9b2ad…

MALICIOUS

PDF

71.8 KB Created: 2021-01-20 12:30:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 7c5d863603e72ef01b22e5ec500426e7 SHA-1: 1afaee9703f528528627a28859ca6fb7769de763 SHA-256: d10597049ce9b2ad175e357c84a2e6abd8ef8192736dc9aeb00f0a39b5f31812
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and an ML classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO abuse tactic to distribute malicious content. The primary URL, https://jottigo.ru/123?utm_term=aiag+spc+manual+4th+edition+pdf+free+download, is likely a lure for users searching for specific documents.

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
  • 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://jottigo.ru/123?utm_term=aiag+spc+manual+4th+edition+pdf+free+download PDF link annotation
    • https://zokevuwokonumez.weebly.com/uploads/1/3/4/6/134682223/61f282a9c831eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451205/normal_5fe47fc34da37.pdfIn PDF document text
    • https://zeraxoxuret.weebly.com/uploads/1/3/4/6/134642117/7559903.pdfIn PDF document text
    • https://borirokuve.weebly.com/uploads/1/3/1/4/131437567/4615848.pdfIn PDF document text
    • https://cdn.sqhk.co/togodawexu/giundyW/59470646965.pdfIn PDF document text
    • https://mutazodot.weebly.com/uploads/1/3/0/8/130874237/7486994.pdfIn PDF document text
    • https://mojoranazo.weebly.com/uploads/1/3/4/4/134403481/luposolerevasa-negoxekepom-mogonukojume.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409256/normal_5fe8d4e2a9d45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393762/normal_5fa947dde7702.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457838/normal_5fd7b1d3ad184.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445116/normal_5fb2ae72949cb.pdfIn PDF document text
    • https://cdn.sqhk.co/vixonafom/WjjGkKT/cute_dogs_names_boy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496402/normal_5fc835a11ba1a.pdfIn PDF document text
    • https://xeropupofusopa.weebly.com/uploads/1/3/0/7/130776394/84e1fd855.pdfIn PDF document text
    • https://jiraxoxaxizare.weebly.com/uploads/1/3/4/0/134012395/todawirujeduxapuge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412160/normal_5fb7b5d7b7af1.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/zafaronivaj/nojavezuvitinowulunitof.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_off0000d987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD987 5736 bytes
SHA-256: 3676c7516a5ca51749f1493c9c100ae75767228743cbc70cfcfbe8a7df80d864
font_01_sfnt_off0000ed00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED00 10732 bytes
SHA-256: bb29be0ba5f2b6c4cace7c1e8e76a60f95b3e9c06e9f5df8f0ccb4444901e323

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