Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc450ba4c3a6f09…

MALICIOUS

PDF

104.2 KB Created: 2021-01-23 00:58:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6e57557b35c1117ef620394ef5391456 SHA-1: 9e750e601d0f324f7e8d483184f73c8d3fc236ad SHA-256: 5cc450ba4c3a6f094fb0f3c8700f741055f42748af225bd7a9f376cbb1f61225
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a high heuristic indicating it's a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The embedded URLs point to potentially malicious or deceptive content, and the document's structure suggests it's designed to redirect users to these external sites.

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://trafficel.ru/aws?utm_term=anaphylactic+shock+guidelines+2018 PDF link annotation
    • https://cdn.sqhk.co/vujenibolo/hchbhcv/77781862989.pdfIn PDF document text
    • https://site-1176339.mozfiles.com/files/1176339/80022070198.pdfIn PDF document text
    • http://vobigabifinu.22web.org/wuwavifet.pdfIn PDF document text
    • https://site-1172627.mozfiles.com/files/1172627/67688717462.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501791/normal_600123bf2f542.pdfIn PDF document text
    • https://site-1173857.mozfiles.com/files/1173857/72396202297.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481821/normal_600a736ed0dca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480145/normal_600a11e201fb3.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelewexo/lTyjaic/riburazojen.pdfIn PDF document text
    • https://site-1176998.mozfiles.com/files/1176998/80_s_soul_music_love_songs.pdfIn PDF document text
    • https://mirijanonukuzo.weebly.com/uploads/1/3/2/7/132740352/difarazonex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386606/normal_5fc697d4d05b2.pdfIn PDF document text
    • https://cdn.sqhk.co/zadorari/jgZkPjb/78636947866.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://damabop.epizy.com/balpampatti_bama_song.pdfIn PDF document text
    • http://dikawixum.epizy.com/wetilavekofegexagexofad.pdfIn PDF document text
    • http://pixagikaw.epizy.com/pubivos.pdfIn PDF document text
    • http://bilunijo.epizy.com/voucher_template_psd.pdfIn PDF document text
    • http://zonadomafi.rf.gd/donekafisagibubudijemarip.pdfIn PDF document text
    • http://lidiwerefibe.rf.gd/gawikuvulunebigog.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_off00015718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15718 5916 bytes
SHA-256: e90fe4e1959c30ddd5a75b1c8a32f69de4fca158dd1619bf33b11e148626f04d
font_01_sfnt_off00016b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B49 12332 bytes
SHA-256: e9bbd59de962a374cfe4ce614e318abc851a4c261a787d127924acab3e24f7c2

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