Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6dcc54eec9b56ca…

MALICIOUS

PDF

65.9 KB Created: 2021-02-14 00:47:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 47e9dd5947b7e4ab0aa2e84cfb6c2812 SHA-1: ade592512983673431f8a84c506478a0551fe253 SHA-256: d6dcc54eec9b56ca9fcb20807c6458bd78c8338593a25fe7f4064fc502c68038
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically referencing 'cookie clicker 3ds' and pointing to a suspicious domain. Heuristics indicate this PDF is part of a link farm on disposable hosting, and ML classifiers and ClamAV strongly flag it as malicious phishing content. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site, likely for phishing or scam purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://baarspo.ru/123?utm_term=cookie+clicker+3ds PDF link annotation
    • https://gawofatofuwe.weebly.com/uploads/1/3/1/3/131380275/3594107.pdfIn PDF document text
    • http://idealica-tufficiale.website/10410249757ecubr.pdfIn PDF document text
    • http://xusibuvuzos.22web.org/cell_biology_and_genetics_lecture_notes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454277/normal_6028569bb343c.pdfIn PDF document text
    • https://xijafidul.weebly.com/uploads/1/3/2/3/132303061/4bf412bd1ffe2.pdfIn PDF document text
    • http://thepropheticapp.com/nice_guidelines_htn_in_pregnancys9xwg.pdfIn PDF document text
    • http://gtomishebs.xyz/rebajepigak2zxqf.pdfIn PDF document text
    • http://kenufapozij.22web.org/59392703356.pdfIn PDF document text
    • https://totijavefukaja.weebly.com/uploads/1/3/4/7/134705726/gojodegaja-vawakezudaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393499/normal_5fec149bb3345.pdfIn PDF document text
    • https://buwuwewofopalun.weebly.com/uploads/1/3/4/0/134097592/vubiwabazoguwov_nuwenudikeg.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
    • http://fibobaxemod.rf.gd/52627751375.pdfIn PDF document text
    • http://gonurorirezode.epizy.com/cerebral_cavernous_malformation_new_mexico.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_off0000b9fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9FA 4576 bytes
SHA-256: 26b1e9964c30bf4e42071608e3d224cb44d6efc260243a74cacb4951fd45e9df
font_01_sfnt_off0000c989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC989 10224 bytes
SHA-256: 4d4791b6193f2965910a7f143eb44ba664418645301b73e721fbadf2daf709a7
font_02_sfnt_off0000ec72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC72 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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