Malicious PDF — malware analysis report

Static analysis result for SHA-256 484128eb00e2e1ef…

MALICIOUS

PDF

67.2 KB Created: 2020-12-18 00:02:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: efac02285bf04f268f097c5f631e4a9f SHA-1: b43e29d77ebde55ddc797ba7d9bf13802ee1764b SHA-256: 484128eb00e2e1ef63759ecbb604489992ec818cfa71562a85e7f9cc5c43ff8d
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-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://traffine.ru/123?utm_term=windows+password+change PDF link annotation
    • https://nadevakijod.weebly.com/uploads/1/3/4/4/134490940/namorub_pefunesil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464874/normal_5fd158d943573.pdfIn PDF document text
    • https://fanawilixu.weebly.com/uploads/1/3/1/4/131408209/sibaw-deledosoziza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394077/normal_5fb74e9a97b4a.pdfIn PDF document text
    • https://tapukupe.weebly.com/uploads/1/3/4/7/134717462/pusozimonu.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/66b421f9-4af2-4e39-b4b5-de682203873e/sojonigamumole.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/73211206312.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83fcbea2-7be9-4b80-bc58-4a72a9534272/wamupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b8203b2-6c3b-4873-bf14-5ff7c0c7ad90/fodolijajamuni.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/air_pollution_cause_and_effect.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92bc593e-4c59-4e79-9ff4-33ca9064bea0/sentry_v252_safe_change_code.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_off0000ca44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA44 5408 bytes
SHA-256: e3e688140b0a12dd38108d92a84763314fb059ecfa041c90492b5fe278b52ab9
font_01_sfnt_off0000dcba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBA 10372 bytes
SHA-256: bef7869f15cfd3d9bb9ff7c57b0827f41eea4db4935bb69098bd4e44d72f5aac