Malicious PDF — malware analysis report

Static analysis result for SHA-256 219bd6c12aca373b…

MALICIOUS

PDF

67.9 KB Created: 2020-12-10 03:47:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: de103b9b320502d28d2b19adf56e3879 SHA-1: 58ddb861bed28f6d748498c28813976830dba4b3 SHA-256: 219bd6c12aca373bd107761d16855a920770dfe48f7151b8eb2e9d04678eb572
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users. One of the primary URLs extracted is 'https://trafficel.ru/123?utm_term=molecules+to+grams', which is flagged as unknown reputation. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically classifying it as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards a phishing or malware distribution scheme.

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/123?utm_term=molecules+to+grams PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369763/normal_5f9b31bb19ef0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407562/normal_5fb47d023cd8e.pdfIn PDF document text
    • https://wozagadukuwa.weebly.com/uploads/1/3/4/4/134483903/9589094.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/zonebon/falinakuzowi.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/sp_balasubramanyam_video_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/brackets_for_kali_linux.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/10300113444.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcefc21de407d5e35cc5ab2/t/5fd17ab20f163860c7a5e10a/1607563961790/world_at_war_ww2_strategy_mmo_unlimited_money.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e7c288c99b6d37a72027/t/5fc483729b1ed035386d863f/1606714227902/sizone.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11a296b97992eb55d442c/t/5fcedb217c363627419f4740/1607392036098/82409820045.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/crohn_s_disease_guidelines_ecco.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_off0000ccf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF5 5124 bytes
SHA-256: ad30d8b757a230d0b3adaa60479e5d77a294d33881c40c65156b25772f6bb53a
font_01_sfnt_off0000de55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE55 10772 bytes
SHA-256: 34d025b2c386092b972a429df27e8a4bfb2d871631674b46e9cbcb57eb465fe8

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