Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eefb4ae3bb8395a…

MALICIOUS

PDF

71.7 KB Created: 2021-01-04 22:59:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 733180c7a488c46b163bbb11c805ef09 SHA-1: 763b78f36a76345d5b2c262be191c7e957ca32bb SHA-256: 9eefb4ae3bb8395a6f6d678ae2fd60395e400a040bcd0023959091167b719225
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier. It contains a large number of external links, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs indicate a malicious intent to redirect users. The primary attack pattern involves leveraging external links for potentially harmful purposes.

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=bare+minerals+brushes PDF link annotation
    • https://luxovozudenez.weebly.com/uploads/1/3/4/1/134108910/fikikenix.pdfIn PDF document text
    • https://cdn.sqhk.co/leburogutu/jjhgTOJ/neon_hockey_socks.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/kijelopazekune/blowing_raspberries_sound_effect.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/sovavedogubotademuged.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e344fb80-0c28-4eb3-9814-037e699e89fb/japanese_puzzle_box_tomb_raider.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ebd18a3-72b4-4d00-ba80-d7b9fd7d8dea/medimecum_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/wasepifuwopekatuwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c98cbfda-c988-4db3-8cb4-e597eea212f7/harley_davidson_parts_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/45124779820.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/telisodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/679fbced-91df-40f7-b4d5-30a794cdfcda/project_critical_path_analysis.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_off0000d245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD245 4808 bytes
SHA-256: 5a0024014ef12aba26b2c3f8b96e122e39521cd40562e7e0e5200bbd7611718c
font_01_sfnt_off0000e249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE249 9876 bytes
SHA-256: 7ed3ee580815132d83ea90ac3b5a5b8d1acaf4280f4594b82ff7ccfc84fa7562
font_02_sfnt_off00010425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10425 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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