Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a68a502e458f8d…

MALICIOUS

PDF

70.9 KB Created: 2020-12-27 16:16:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 90231c158eb70471b897a2b17fbd4a7b SHA-1: 7bb94c0d4a818033c442638e59b8e3093f9fb561 SHA-256: 22a68a502e458f8de1e1bfe60f43e7fbeb5f6c4f93a45eb395bfe93ac26c11c0
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to S3 buckets and Weebly-hosted PDFs, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffset.ru/aws?utm_term=fly+fishing+report+delaware+river PDF link annotation
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/45973f8adf7.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/vovalukafiluzasafudu.pdfIn PDF document text
    • https://kebuwusatame.weebly.com/uploads/1/3/5/3/135343151/3e082c0876f41e8.pdfIn PDF document text
    • https://rusezoxebob.weebly.com/uploads/1/3/4/3/134355184/4506540.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/xniglsZ/wutuginokogudiwiki.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/wuvepilamamuse/1581355716.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/persona_4_rise_social_link_deadline.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/blank_t_shirt_image_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/xiaomi_camera_apk_xda.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/unit_4_civil_war_and_reconstruction_key.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_off0000d9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C2 5512 bytes
SHA-256: 7d607c45836631aea1f7699ae9ef13d6e283c3984e35714be5a1d93569c5b9a1
font_01_sfnt_off0000eca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA1 9924 bytes
SHA-256: 0cbef4b7d37ff683bef5f846a347ffe44c15718978b21338b1553e02f081f789

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