Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce0639341ed81c3…

MALICIOUS

PDF

66.3 KB Created: 2020-12-16 16:29:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7855aa93d8de20c85cee3b69cd280351 SHA-1: 7dc708dc9fb564e795325ad05d819a23d79966da SHA-256: 1ce0639341ed81c3217b5a75639c054ddacdda6623caf429d43e8d8a362c43ae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, with a critical heuristic identifying it as a PDF link farm. The primary external links observed are likely part of a scheme to direct users to malicious or phishing sites.

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://trafficel.ru/strik?utm_term=approaches+to+learning+myp PDF link annotation
    • https://zaxizibu.weebly.com/uploads/1/3/4/6/134672664/7047853.pdfIn PDF document text
    • https://nuzepobijane.weebly.com/uploads/1/3/4/8/134885792/lopasuf.pdfIn PDF document text
    • https://xukopalobupekon.weebly.com/uploads/1/3/4/7/134730613/katixivedosisijiwe.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/e034a2ad-166c-4603-93cb-1b14545e426c/73686195236.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/281edc52-60a3-4169-8efa-cad1eca3d4e1/ach_mandate_form_of_hdfc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7311e813-47e8-45b6-ad59-8adfc63befda/5446753922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01b2cf0c-5c91-4da6-bc2f-aa96dde4f2cb/73228944146.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc787cf81fec0096842b2a2/t/5fce63f80ab5d62feb26ee7b/1607361529898/kikilaxugijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb576cb8-7ad0-4155-afa1-e970844aee8b/radio_flyer_classic_tricycle_12.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f1c03bd-f03b-44fd-8b59-66428895c537/felidadusifedefowebojam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/023b762b-762a-409f-9d7d-6cf4012fce87/tikuraze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e0a0f41-a384-482b-8e9d-9e29864ec2da/basketball_legends_game_y8_games.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_off0000c612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC612 5440 bytes
SHA-256: 1b520defb3d661c0007df940b683319a09acf40b730458fee3558a9d5c109a5b
font_01_sfnt_off0000d86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86C 10912 bytes
SHA-256: 2a94260e5819e55b51f7638553218c20433e8b8499aaaf3ba55bb437069ad444

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