Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbe3548f8ae01c34…

MALICIOUS

PDF

69.7 KB Created: 2021-03-09 04:59:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: afeb5414d2f33cf27800f3c6572936ae SHA-1: 3a7825a8aaba8f6a1217cee0a17f251e9f5f6556 SHA-256: dbe3548f8ae01c341342d5b1280eccf2524562d94fff1ba2c05a5635110d3044
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to link farms hosted on disposable domains, with one prominent URL being https://vilenefex.ru/123?utm_term=bandook+wala+game++apk, suggesting a phishing or malware distribution lure. The document body, though heavily obfuscated, contains references to 'Bandook wala game apk' and 'wkhtmltopdf', indicating a potential attempt to disguise malicious content as a game download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://vilenefex.ru/123?utm_term=bandook+wala+game++apk PDF link annotation
    • http://jiviwizun.iblogger.org/5719250975.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383925/normal_5fc67fecc74cf.pdfIn PDF document text
    • http://vebuwovivulab.mygamesonline.org/44804626404.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471253/normal_6012170121185.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/90854195781.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380680/normal_5fe43cbe1b207.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412413/normal_5fd7078c168c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453333/normal_5fdb745e74325.pdfIn PDF document text
    • http://fisitupogavi.mypressonline.com/digefesifotozomujow.pdfIn PDF document text
    • http://guwugil.22web.org/ante_nicene_fathers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387816/normal_5ff5327f4e185.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464996/normal_603fe7c8733da.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/88588493055.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407777/normal_5fee72bad678b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375541/normal_600a8f7913e0a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bofutezexo.rf.gd/does_irs_recognize_common_law_marriage.pdfIn PDF document text
    • http://xukobogovug.rf.gd/40501849293.pdfIn PDF document text
    • http://bexumasifawej.epizy.com/zifuguragaxuvixekajat.pdfIn PDF document text
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_764fec04aa8341c8bff5745bcd258615.pdf?index=trueIn PDF document text
    • http://lobadonuvupadux.rf.gd/jegazujewodaxomigol.pdfIn PDF document text
    • https://e0a971b2-7104-4718-9e5f-4f17d768618f.filesusr.com/ugd/6d43b6_7e9ea401ca9e493ab06eba0360754b15.pdf?index=trueIn PDF document text
    • http://vevenamefod.epizy.com/free_indemnity_form_template_south_africa.pdfIn PDF document text
    • http://rabuwupitakif.rf.gd/get_your_guide_paris_promo_code.pdfIn PDF document text
    • http://zenejoku.rf.gd/66972973992.pdfIn PDF document text
    • http://daporanil.epizy.com/pikox.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_off0000d5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FB 5212 bytes
SHA-256: 1b8a49bdac282f199ec31b548a5cf8f16d3cac4bc181210f2fee34992d53d220
font_01_sfnt_off0000e7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BF 9952 bytes
SHA-256: 98ce6f0852d06a7f57e86c53b1b2c34c70116a676f90145ab5f4c1657e76f273

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