Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c4f20d68afb2608…

MALICIOUS

PDF

73.0 KB Created: 2021-01-22 01:27:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d9d22d67d76ba32ec43a19d7af48683e SHA-1: 2ccd89dd66312858fbe100a4b1552169dbfe7cb8 SHA-256: 9c4f20d68afb26083221abbf1f2095163ab8dc4c33112028f756bbc94a83bc04
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are part of a link farm designed to redirect users. The primary lure appears to be related to 'golf clash mod apk', suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for credential harvesting or malware distribution.

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 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://trafftec.ru/123?utm_term=golf+clash+mod+apk PDF link annotation
    • https://jazebaza.weebly.com/uploads/1/3/4/6/134662006/lajijaviz.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/n6Lgjvt/46570171426.pdfIn PDF document text
    • https://site-1176413.mozfiles.com/files/1176413/encyclopedia_brown.pdfIn PDF document text
    • https://cdn.sqhk.co/guxuboru/hiLgjgh/bee_factory_app_max_level.pdfIn PDF document text
    • https://wojedebaroz.weebly.com/uploads/1/3/1/6/131637691/jofapuwepogav_welaj_kawudul_tanoxe.pdfIn PDF document text
    • https://cdn.sqhk.co/kifavubivelo/hiHgfHq/leduvafegu.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/dusuraduleki-tigima.pdfIn PDF document text
    • https://luxaxila.weebly.com/uploads/1/3/0/8/130814132/sulefotu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fasilew.epizy.com/90338865811.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/error_lnk2001_unresolved_external_symbol___imp___crtdbgreportw.pdfIn PDF document text
    • http://tuvatopuvonu.epizy.com/beeping_during_phone_call_android.pdfIn PDF document text
    • http://riramemixezu.epizy.com/berok.pdfIn PDF document text
    • http://pipiwilevo.rf.gd/bulbul_film_songs_kannada.pdfIn PDF document text
    • http://kenuzuwemonuda.epizy.com/free_aol_mail_app_for_android.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_off0000ded2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED2 5396 bytes
SHA-256: a84d9e6785a376e071d884f5c8cef02e84507fa6ac742aa0639e7b83c6d13d8a
font_01_sfnt_off0000f10d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10D 11264 bytes
SHA-256: 892f84abdfaf1564770bb0a63f6912fa4f47fef838dae796a9dc4f2feaee641b

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