Malicious PDF — malware analysis report

Static analysis result for SHA-256 b43c6c9d6440d904…

MALICIOUS

PDF

71.3 KB Created: 2021-03-09 17:39:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3498306d16bf8d61f129af54378e1d9d SHA-1: 1814ec4e14e5d0d1e33b0b465765f0c301aa81f2 SHA-256: b43c6c9d6440d904f69f1e7f3b59b7e9d85827814365105eec0a13a192cacac5
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to improve search engine rankings, indicating a deceptive purpose. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded URL 'https://jacksth.ru/wix?keyword=first+touch+soccer+2015+apk' is presented as a lure for a game download, which is a common tactic for distributing malicious payloads.

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 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://jacksth.ru/wix?keyword=first+touch+soccer+2015+apk PDF link annotation
    • http://zuxegesa.iblogger.org/fallout_new_vegas_cheat_codes_ammo.pdfIn PDF document text
    • http://faxozulakevosos.iblogger.org/autumn_sonata_1978.pdfIn PDF document text
    • https://zemapefim.weebly.com/uploads/1/3/4/4/134485651/7789a4c3447628.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451352/normal_5fe496576d83c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403537/normal_5fd712bd10d55.pdfIn PDF document text
    • https://putoluvutawubu.weebly.com/uploads/1/3/1/4/131437806/3452472.pdfIn PDF document text
    • https://gimogelego.weebly.com/uploads/1/3/4/6/134601730/jabajobiwupe_wofesuxukobar_zotunesowitax.pdfIn PDF document text
    • http://sidivupexelado.22web.org/18981462531.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404980/normal_6016fc6632a70.pdfIn PDF document text
    • http://juvozukatug.66ghz.com/bob_ong_kapitan_sino.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wujewepal.epizy.com/molle_ii_assault_pack_multicam.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/easy_anti_cheat_crossout.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/rupanawat.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/37378292532.pdfIn PDF document text
    • http://nirobow.epizy.com/black_desert_xbox_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/96426297588.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/betternet_vpn_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/agenda_template_google_sheets.pdfIn PDF document text
    • http://ruxududomaba.epizy.com/74201895923.pdfIn PDF document text
    • http://loluxemo.epizy.com/pitemapatovuxogupikix.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/2335975574.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_off0000d96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96A 5456 bytes
SHA-256: 97f606b9eb4cf8142a5116984681b510353452f7a74bfd2955ed25780b4f4677
font_01_sfnt_off0000ec02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC02 10608 bytes
SHA-256: 5ceb4dda99d6dae9be0e0f90d83e1ece4a3ffddd7e23017fd0edb5b4461865bf

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