Malicious PDF — malware analysis report

Static analysis result for SHA-256 790ca0f2179a2531…

MALICIOUS

PDF

81.3 KB Created: 2020-12-20 15:20:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c116b735d3c1792c6e3b67b6ca5a98c SHA-1: 4c1db8b90df7f144edbcc179166de6e8b713300b SHA-256: 790ca0f2179a2531376b8a31975739735de723ff2bff0f3fe71d06acd9d935b1
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, with one pointing to a suspicious URL on 'traffnew.ru'. The 'PDF_SEO_LINK_FARM' heuristic indicates a mass of external PDF links, suggesting a tactic to manipulate search engine results or distribute further malicious content. While no scripts were explicitly extracted, the presence of external links and the ML classifier's high confidence score point towards malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=warlords+of+draenor+flight+trainer
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/zegomotagenig.pdf
    • https://cdn-cms.f-static.net/uploads/4414679/normal_5fb69be09d6d6.pdf
    • https://puvemeximaz.weebly.com/uploads/1/3/4/4/134442093/bofejenadugedoxo.pdf
    • https://tokokurud.weebly.com/uploads/1/3/4/7/134744431/tenid-juxovi-sizaregozifajat.pdf
    • https://cdn-cms.f-static.net/uploads/4415782/normal_5f9fffc818c6f.pdf
    • https://tubolapibakosi.weebly.com/uploads/1/3/4/8/134872187/6646288.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/47c25e8c-70f2-4822-a9dc-ce4ec360fc73/voramisufosezarevutasor.pdf
    • https://s3.amazonaws.com/rovuweraja/remefosexifoveboxewajete.pdf
    • https://s3.amazonaws.com/xoguwavosuje/looker_google_sheets.pdf
    • https://s3.amazonaws.com/fifomi/rujegebikufo.pdf
    • https://s3.amazonaws.com/sefabe/facade_game_without.pdf
    • https://s3.amazonaws.com/nagudo/free_sample_biography_template.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010e6f.bin
f4cbf959bacca067f1b72354ad56cc61b56856e9d80276d6405c1a40cd26a20f
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10E6F 24896 bytes
font_00_sfnt_off0000d71b.bin
10f148a4cada260e9cdbdd54ffa904c940690455bdee45313d7efebd854add92
pdf-font-stream PDF embedded font (sfnt) at offset 0xD71B 5184 bytes
font_01_sfnt_off0000e8c1.bin
e027713d9dd2f633b7e3267cde8803197490323d8daed83c5dc0a54040c894f8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C1 11008 bytes