Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e3e7c88fc6c63e…

MALICIOUS

PDF

67.2 KB Created: 2020-11-24 19:34:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 350016df99dbbe3fee76973653d49668 SHA-1: 1d9fa75ad622910f294b90b4652f17a692267950 SHA-256: 68e3e7c88fc6c63eddfe2dd7a1ec074e4fad2ae64f2585d2808c41fc6fb76cb1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm and has been flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The embedded URL `https://trafffi.ru/strik?utm_term=an+unsuitable+boy+pdf+in+hindi` suggests a lure to a malicious site. While no scripts were explicitly extracted, the PDF structure and the presence of external links point towards a malicious intent, likely to redirect users to a compromised or phishing website.

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
  • 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.
  • 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://trafffi.ru/strik?utm_term=an+unsuitable+boy+pdf+in+hindi PDF link annotation
    • https://vigodabazo.weebly.com/uploads/1/3/4/8/134872933/gukotofot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f874522568cd.pdfIn PDF document text
    • https://xirofepomare.weebly.com/uploads/1/3/0/8/130814083/62136e87e.pdfIn PDF document text
    • https://gisetokitalakak.weebly.com/uploads/1/3/4/6/134600310/1672237.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478414/normal_5fb3252303111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369310/normal_5f8ace1d2da9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367271/normal_5f8d39ac55ba4.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
    • https://s3.amazonaws.com/gewuwasi/rsum_d_andromaque_scne_par_scne.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10c9b178-6140-417a-bdef-8b3bbcd5112b/sekab.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/4919000117.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/nadazavapematiguvudin.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/43009280615.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/nubabisiwikuvizurem.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_off0000bcd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCD0 5148 bytes
SHA-256: 848b31c728a9246aa57073613aeb8a85aecfd93bd83f7425d6b4d2282df892d9
font_01_sfnt_off0000ce4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE4B 10652 bytes
SHA-256: 55b863027311f0a20b0859ef9c103df435fb958ff4b6502c1646784f2fc537a0
font_02_sfnt_off0000f210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF210 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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