Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3a270edd32fa0b9…

MALICIOUS

PDF

63.1 KB Created: 2021-01-11 07:21:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ee77efbabb752f4edbb7efcf9882b070 SHA-1: dcf2cebd0252bf0d5b50448ce6818ba3b0f84e84 SHA-256: d3a270edd32fa0b995df480afa638bb894d1b27db3ad8926b4635efcc718535b
156 Risk Score

Malware Insights

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

The file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a PDF link farm. It contains numerous external URIs, with one pointing to 'traffnew.ru', suggesting a phishing or malicious content distribution attempt. The presence of multiple PDF links, as indicated by the 'PDF_SEO_LINK_FARM' heuristic, reinforces the conclusion that this document is designed to redirect users to potentially harmful sites.

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 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://traffnew.ru/123?utm_term=brand+new+merch PDF link annotation
    • https://cdn.sqhk.co/tedogegez/fjiY219/piwizibotojutines.pdfIn PDF document text
    • https://donasidavojixa.weebly.com/uploads/1/3/4/4/134494786/e535f.pdfIn PDF document text
    • https://cdn.sqhk.co/zolaxadivowe/djiibpY/virtual_races_with_medals_2020_halloween.pdfIn PDF document text
    • https://cdn.sqhk.co/bunewonu/jegfjjc/tezejibavotexol.pdfIn PDF document text
    • https://tapituxupali.weebly.com/uploads/1/3/1/3/131382330/2fcfc73f.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/jbges5q/nikola_tesla_wife.pdfIn PDF document text
    • https://lumirofelefepo.weebly.com/uploads/1/3/4/8/134892557/pagimebirigof-letesowuxoraxo-rimit.pdfIn PDF document text
    • https://cdn.sqhk.co/lopumilekana/tCZYijq/soxafetetajuk.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuzemabad/i72ejbK/88876870572.pdfIn PDF document text
    • https://cdn.sqhk.co/pefibovip/hbgfNib/wajojemume.pdfIn PDF document text
    • https://tixosagekade.weebly.com/uploads/1/3/4/4/134489061/6677284.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/block_strike_mod_apk_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/writing_culture_james_clifford_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/11814438573.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_off0000be6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE6D 5108 bytes
SHA-256: 551c9700b426899a04e94ba3b983b81edeb633db645c72e856abd0a9d372c889
font_01_sfnt_off0000cfb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB2 9288 bytes
SHA-256: 7589f692c668fa1695be981adda57fa66faf98984770289c84781e759e252b0d

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