Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6df6da94a419573…

MALICIOUS

PDF

87.2 KB Created: 2020-12-17 12:08:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3e94451770616dd737df8ffb6b1dfc0f SHA-1: b9caa0e9a232dae26c1d6f87113d99c7f1a70428 SHA-256: b6df6da94a419573c4dc0a5eae78b6184986f37619041181a898add76f3f99a7
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a link farm, indicating it is designed to host numerous external links. One of these links, 'https://trafficel.ru/123?utm_term=word+whizzle+the+rainforest+answers+hot+stuff', is likely a phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

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=word+whizzle+the+rainforest+answers+hot+stuff PDF link annotation
    • https://gozarijaleb.weebly.com/uploads/1/3/4/3/134337750/639aea1afa9d1df.pdfIn PDF document text
    • https://duwaratax.weebly.com/uploads/1/3/4/6/134621450/mulokiluv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/7606321630.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/periodic_table_worksheet_key.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4c514f98375720d69231/1606372433832/3195450596.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1deddbb-9211-408c-bb7c-def83439f79a/cannon_lake_troll_manual_downrigger_reviews.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe03f5e6d49a06bb57cdcf/1606288375218/the_son_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5181ac9-45c8-4bd5-b40e-fef7b7900c58/map_of_canaan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5191c261-2c4f-451d-b1d1-c6da490b7231/litibu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc570e5104edf1d779faec4/t/5fc60de518e72e5fdba6e231/1606815205781/11390309730.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bee7dab9-267c-4392-8c38-b21da5f03d79/cleveland_browns_247_watercooler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c6478cc-2c0b-4c62-af5e-88ab2c7245e2/15608874453.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9aca0e2e-93cc-417f-8691-8d89e3a85d75/samsung_level_u_pro_anc_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B31 5032 bytes
SHA-256: ec22cf2c559ac8c829697853f7ce41ee7cbb99c2d6ac78f4fa38803444c6e326
font_01_sfnt_off00011c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C66 10364 bytes
SHA-256: 80e03e7caefc328a545928500a008001f0b41f05a5668a171b8425d77d5d4318
font_02_sfnt_off00013fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FB5 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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