Malicious PDF — malware analysis report

Static analysis result for SHA-256 133513cd74a37b95…

MALICIOUS

PDF

71.6 KB Created: 2021-01-27 03:02:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 850f4c9f7553c068434dc1e11690df43 SHA-1: c3429bac55b2900af48f065bfd5410bb9e6548ed SHA-256: 133513cd74a37b954df6d60002c0c87c00adf87a8bba24f9465ea20bb3f2ac60
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffine.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of embedded URLs and the redirector link strongly suggest this document is designed to lure users to malicious sites, likely for phishing or to download further malware. The ClamAV detection further corroborates its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffine.ru/wb?keyword=best%20gem%20mines%20near%20me In PDF document text
    • https://static.s123-cdn-static.com/uploads/4463262/normal_6005c25f96ed3.pdfIn PDF document text
    • http://apsdd54gfv.xyz/amazon_australia_cancel_kindle_unlimitedsrtu8.pdfIn PDF document text
    • https://cdn.sqhk.co/vonitumefide/nhdEie4/f1_players_kneeling.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496818/normal_5ffb68fc62ed7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490264/normal_5ffeffb0ecb7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445343/normal_5fffbd88c896d.pdfIn PDF document text
    • https://cdn.sqhk.co/jezofadu/4WOGvMf/xobekedokid.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/dLhi6ii/world_conquest_war_strategy_hoi4.pdfIn PDF document text
    • https://cdn.sqhk.co/dorusafe/4gjhgvP/62188022084.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489713/normal_5fec25a1ecf5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424689/normal_5ff6553253459.pdfIn PDF document text
    • http://bcipreactivaperu.com/pajozepodaxunetilodehm.pdfIn PDF document text
    • http://detonic-buy.website/libro_didactica_general_agustin_de_la_herrancq66i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425501/normal_60038c689df59.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://notijopozij.epizy.com/galloping_foxley_roald_dahl.pdfIn PDF document text
    • http://revuzulikasulo.epizy.com/powatodusiwoz.pdfIn PDF document text
    • http://tivogowajap.epizy.com/10743034521.pdfIn PDF document text
    • http://pakatikik.epizy.com/vuvofapuvitozo.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_off0000db23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB23 5020 bytes
SHA-256: f375dd57ed8825cebdc6110b5301d1a22233870bda0fdbab76be6d317fe3fabc
font_01_sfnt_off0000ec22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC22 10972 bytes
SHA-256: cbee0d3757894041b12fc755b056360fa2ef4e4e39c0d2bdb48ef602911f1679

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