Malicious PDF — malware analysis report

Static analysis result for SHA-256 74e43f4797292309…

MALICIOUS

PDF

87.1 KB Created: 2020-11-24 17:23:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 07b1a780df849ebf67e8f2785d80a261 SHA-1: 62048ae3a453408bd63b45c62a39258609b8afb6 SHA-256: 74e43f47972923093edb93709fe16b70bbe88c451ce59e67035982c7213cd056
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable hosting and redirect to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a link to cctraff.ru, indicating a malicious redirector. The ML classifier and ClamAV detection also strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/123?utm_term=s+court+of+thorns+and+roses+pdf In PDF document text
    • https://wagimudo.weebly.com/uploads/1/3/4/4/134475497/fopudexuwadazuwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467277/normal_5fbb91590d890.pdfIn PDF document text
    • https://bonopabugo.weebly.com/uploads/1/3/4/5/134581776/lopabulibabeta.pdfIn PDF document text
    • https://kagizorofom.weebly.com/uploads/1/3/4/4/134476017/wunadiwomalej_pegedu.pdfIn PDF document text
    • https://lisilabonefep.weebly.com/uploads/1/3/4/5/134527166/1468588.pdfIn PDF document text
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/xodigosiluruni.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://uploads.strikinglycdn.com/files/0d406e6f-55be-4504-8411-fa4310ca6627/sanatol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af2a9dba-f3bc-4cff-bce9-76d9bc2c325e/51293278701.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/64654192729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f341d25-e3e1-485f-9620-b062a92d9af4/famatizadagaburivap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa8c072d-5941-4977-9183-4716abd086c3/jean_claude_van_damme_cyborg_tam_fil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02e8d515-fb93-411c-bb79-abb15fdb44e8/74750825880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0911d4e1-764d-4696-aec7-96defec528c5/57738100176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/024ad033-3cea-4bcd-99d5-0f576404c72d/23922631878.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/zugebasarosagipusuzijavan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21cf7208-ffff-4195-81c4-7c6adacb4e9e/25963424478.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df3d1eea-c0ff-4ab2-b055-0460669cf265/wepebejajujimexefumezed.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_off00010d21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D21 5148 bytes
SHA-256: 92193e95ecdac44424b8b0d8673207ecc9c7d53496248d8366130838ed95863c
font_01_sfnt_off00011e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E89 10112 bytes
SHA-256: 5574036cd4d6186bf2fcab1fed44d055db770188ea52752f6f8b9bb595a70f08
font_02_sfnt_off000140f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140F1 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361