Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc4eb2a61722647…

MALICIOUS

PDF

67.0 KB Created: 2020-11-23 12:49:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 96db3c54d2ae43f09ff3d481dd6fee7b SHA-1: d5cb4102f83e943399aecf84421d17f876840125 SHA-256: bcc4eb2a617226477b88769367db051bf54fd863b5be59df0aa7c45d4c1a8dd2
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO spamming operation. The presence of 'Roblox hack tool android' in the document body indicates a lure to attract users. ClamAV and ML classifiers flagged this as malicious, likely due to the suspicious link distribution and potential for redirecting users to phishing or malware sites.

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://traffset.ru/aws?utm_term=roblox+hack+tool++android PDF link annotation
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/520770.pdfIn PDF document text
    • https://nulosogitizibe.weebly.com/uploads/1/3/4/3/134317173/988202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407299/normal_5f93b7860c8c0.pdfIn PDF document text
    • https://razijidepafex.weebly.com/uploads/1/3/4/8/134891772/zuwuwaxa.pdfIn PDF document text
    • https://vifesomojijafi.weebly.com/uploads/1/3/4/3/134337648/zodimefajoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376357/normal_5f991236a2d61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383916/normal_5f9600eec09ca.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/3257372.pdfIn PDF document text
    • https://weduparazibad.weebly.com/uploads/1/3/4/7/134710999/7dbf3d2d0ab9a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6449588d-9002-44de-9f1b-e642b83fc5f2/pivuvoriberewezoxazo.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/metabolismo_de_las_proteinas_en_rumiantes.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/xunabibezoz.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/neziresovonanunodop.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_off0000c992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC992 5128 bytes
SHA-256: 69f85366878daa409c4dab6b733bc98ddf9b025da874af84c1a32118139b5753
font_01_sfnt_off0000dafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFE 10632 bytes
SHA-256: eac666d759cc222addb4ad8781bd94fe87f2d0dc315ea83dad7ea8e4bd126453

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