Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccb04ebd6f6fb500…

MALICIOUS

PDF

71.7 KB Created: 2021-01-01 03:19:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 831fca98aa72aa43ce905ba0203be398 SHA-1: 9200f451d4699814df912505589eff8146cfb58e SHA-256: ccb04ebd6f6fb500c9b7e75d925a53ce78a12fa767d95d78c2a91fded7ff9011
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or a trojan. The embedded URLs, particularly the one to 'trafffe.ru', are suspicious and likely lead to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/123?utm_term=how+many+ounces+in+a+bottle+of+water PDF link annotation
    • https://bileravufal.weebly.com/uploads/1/3/4/7/134749654/kilelonalod_geseg.pdfIn PDF document text
    • https://vesumuzuvof.weebly.com/uploads/1/3/4/6/134685641/gegebirivotu_jezagevikifakof_goxesix_poditisubu.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxozowaki/hI3fgil/zenonia_5_berserker_or_paladin.pdfIn PDF document text
    • https://zuxosudeti.weebly.com/uploads/1/3/4/3/134359900/bugew.pdfIn PDF document text
    • https://tazeviguso.weebly.com/uploads/1/3/4/3/134339516/tavaramu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/datarofapakil/93384582615.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/bsc_agriculture_syllabus_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/gesetovonekojitoxador.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/xiaomi_mi_9t_pro_review_android_authority.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/multivariable_calculus.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD35 5204 bytes
SHA-256: 8e765c1c024fc0805a5f8357926873a4d7cb8f66b0e49bb24f540ff52fc13d9a
font_01_sfnt_off0000ded5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED5 10832 bytes
SHA-256: c015d0b14c3d98a3ba795303ecfd04eb0bc574164acca05e15fc4adead2edd73
font_02_sfnt_off000103ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EC 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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