Malicious PDF — malware analysis report

Static analysis result for SHA-256 67b67df0a071bb2d…

MALICIOUS

PDF

68.7 KB Created: 2020-11-17 19:26:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: cdbb0f5f3f833e3403bfb2c3b242df30 SHA-1: c32ba4901abe734c19be66aad131dcaba6cf8bf4 SHA-256: 67b67df0a071bb2d4104caaf9e84c2a38e39ac892015a5b6d6a6225c3a0b2c43
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF SEO link farm, with the primary malicious URL being 'https://trafftec.ru/123?utm_term=supernatural+hellhound+cast'. This suggests the document is designed to drive traffic to potentially malicious or phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://trafftec.ru/123?utm_term=supernatural+hellhound+cast PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375703/normal_5f982614c95d8.pdfIn PDF document text
    • https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/faxanumaja-xegun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391305/normal_5f8e4240b0abe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386620/normal_5fa6b54fe215a.pdfIn PDF document text
    • https://pisilobeko.weebly.com/uploads/1/3/4/7/134728547/25ef6a6.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/jugafafinizabaw-pugajumigu.pdfIn PDF document text
    • https://damafofazawarag.weebly.com/uploads/1/3/4/3/134369947/2201dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485801/normal_5faf751ce4ca5.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/dotivaf/microbial_genetics_and_molecular_biology.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/just_the_way_you_are_chords_ukulele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0306a573-4d91-44bb-8619-a5ddf180928f/1611616533.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/trading_in_the_zone_master_the_market_with_confidence_discipline_and_a_winning_attitude_download.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_off0000d186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD186 5264 bytes
SHA-256: c47a59e59ccb2916414e4617023ad4284f74fde8d13150211f4e04e337623c14
font_01_sfnt_off0000e35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35E 10192 bytes
SHA-256: f9fb6f4f0a62c83782b18984e8ea20f6cc5799ee28283c34d03fdecb17ec9638

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