Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d991efd1550831f…

MALICIOUS

PDF

65.4 KB Created: 2020-11-26 10:17:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c46d8db4e0b94fc8c0bd2091d7c1c38e SHA-1: 9369554e0f26d85f4a01efb002b1cd140e7458b9 SHA-256: 2d991efd1550831fd328714c761ab935be9d2562474372132f179fff6ba0ec9b
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/123?utm_term=leonardo+da+vinci+complete+works+pdf PDF link annotation
    • https://gudojovevisepu.weebly.com/uploads/1/3/4/3/134314990/gozuna-wovuzodanafamu-pedimapifezakom-favifuluwinebi.pdfIn PDF document text
    • https://rigonabex.weebly.com/uploads/1/3/1/4/131483185/saxexovupewub.pdfIn PDF document text
    • https://jewajufigojoxi.weebly.com/uploads/1/3/1/4/131438211/lugiro.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/2de3d11a62313.pdfIn PDF document text
    • https://patelevenimo.weebly.com/uploads/1/3/1/4/131437444/tipopimuzebumoj.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/jufowokedunod/31078770403.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/rarebatelipawa.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/animasi_bergerak_powerpoint_ucapan_terima_kasih.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/brute_force_password_online.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/canon_mg3500_ink_tesco.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/kifadanotaf.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/gitlab_ci_template_include.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_off0000c678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC678 5460 bytes
SHA-256: 1a10dcb2f653cd29c73588f4fde253a9cb4a4eec7923304f90b58b9c955721e6
font_01_sfnt_off0000d910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD910 9368 bytes
SHA-256: 49398b87f88f5f2b6db368f62926ec9581b6f081d1330554242a2c615ae4be7c