Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbd58ce2c3bafb24…

MALICIOUS

PDF

74.1 KB Created: 2021-01-11 22:41:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: fa17d0b90aa746d07d4c040e491d1b5c SHA-1: 7f64e9e349d7efbca58bbf0552ad90d952472d03 SHA-256: cbd58ce2c3bafb24eba15dcb2836efded9d6c6fcc039c14373e7e9afde649538
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with the primary URL being trafffe.ru. ClamAV and ML classifiers have flagged this file as malicious, specifically as a phishing trojan. The embedded links suggest an attempt to redirect the user to malicious sites, likely for credential harvesting or further 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 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://trafffe.ru/aws?utm_term=professional+cv+format+for+chartered+accountant PDF link annotation
    • https://nimivumunekal.weebly.com/uploads/1/3/3/9/133999229/767453.pdfIn PDF document text
    • https://cdn.sqhk.co/pomijatan/cWZSIha/83484879319.pdfIn PDF document text
    • https://mogobuzuxoxede.weebly.com/uploads/1/3/0/7/130740257/xanosasep_vajisamigiwimi_xodaduxiges.pdfIn PDF document text
    • https://cdn.sqhk.co/duzemata/SgeUuFM/92855762889.pdfIn PDF document text
    • https://cdn.sqhk.co/silutoge/gjigahe/pacific_time_abbreviation.pdfIn PDF document text
    • https://bipokedofep.weebly.com/uploads/1/3/5/3/135322207/vewasapexupawibetova.pdfIn PDF document text
    • https://cdn.sqhk.co/pibegufuxova/ijihifi/defense_zone_3_unlimited_money.pdfIn PDF document text
    • https://rexakutomas.weebly.com/uploads/1/3/0/7/130739652/6be3f950eb7da72.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/kodipopujufipig/revista_the_economist_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/30125291006.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/5512658393.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/brian_greene_books.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/game_pokemon_black_and_white_ppsspp.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_off0000e427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE427 5324 bytes
SHA-256: a60ae10cc2eb6bff2646dc6ecf969d88cf0470f3d4c2257e00c80bfed6180a8f
font_01_sfnt_off0000f61c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61C 11064 bytes
SHA-256: 889e2315db4b8d2be6905bbd87ad96f86c3f9c017d6217e99aff9ce147c3bfa1

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