Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2eb1842730e0797…

MALICIOUS

PDF

79.5 KB Created: 2020-11-27 09:55:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6965a21dbb007f57b74d6510454753de SHA-1: aaa06bc548595df4dca9e56a82cf4cae5dd8bd6f SHA-256: c2eb1842730e07972981d6e3309440759ff92cfbd77290c31738244fd464299e
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/aws?utm_term=hindawi+publishing+corporation+case+reports+in+dentistry PDF link annotation
    • https://gewosawoma.weebly.com/uploads/1/3/0/7/130739201/ripakopapifeven-putagineninufe-duveworos-kudaso.pdfIn PDF document text
    • https://ziperibeletoru.weebly.com/uploads/1/3/4/7/134761266/kinekelegepogameg.pdfIn PDF document text
    • https://dozunetad.weebly.com/uploads/1/3/4/4/134472758/48dca2cc8edd.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/9b53ec72f.pdfIn PDF document text
    • https://lipijubirenazob.weebly.com/uploads/1/3/4/7/134722159/kezotoru_lelafi_nixusaxoroz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/76add7ba-cb3d-4dce-ba2d-04dd762c66be/43122568909.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbd3d811-16e7-46a7-8322-42e66429ecc4/yes_please_amy_poehler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0228d264-17c0-496a-906a-3fdbe6a9fbf6/31775363917.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/consumer_behaviour_articles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b810752-6a37-4ad2-8711-7bddc3b2ec2f/pamigakilififogeses.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/ncs_audio_visualizer_app.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_off0000f935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF935 5632 bytes
SHA-256: 49fb539c67354c62c400f34118deea8306a98d4ebcad212c791ee2950abcf24d
font_01_sfnt_off00010c65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C65 10812 bytes
SHA-256: 919f529bbded0f4d292868e020b626393b019288255da92c89b351bb7674e52e