Malicious PDF — malware analysis report

Static analysis result for SHA-256 dce87bb1b47aa135…

MALICIOUS

PDF

61.2 KB Created: 2020-11-12 14:42:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 7ebf69af256aa72cc4fc62ab51f7640d SHA-1: b660c925e0490c6ff7e847510875fcfa32d66dcd SHA-256: dce87bb1b47aa135c5e5a5bca4aab3bd12d6d6cdf4d3906304fa7a8874ae4144
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://traffine.ru/123?utm_term=lincoln+handy+mig+replacement+gun'. This URL is presented within the document's content, suggesting a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient to infer a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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.
  • 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://traffine.ru/123?utm_term=lincoln+handy+mig+replacement+gun In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377706/normal_5f8ab70ed6e30.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/b8d08daf-b760-40c3-a167-c85740db94a9/pes_2018_apkobb.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/97838047632.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/ha_gayyyy_sound.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75394a0e-ff82-49f4-a8bd-51ce9285966e/zudapujuwafeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/530c4b6c-a913-4640-b16f-455e62b6c406/resuwoxapadulibo.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/14323065593.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/wow_classic_druid_leveling_guide_icy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a4fd734-6093-40d5-8eac-4d908a2432b7/mulanexisekojub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/150483ff-3966-45af-82d7-edeb09bed54e/fovavutabotujosaridomuxu.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_off0000b1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D2 5352 bytes
SHA-256: 4f5a40fb49ef8cf9107234f2c2af17caafe968c50d0bbbc559587f251b32130c
font_01_sfnt_off0000c3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3ED 10880 bytes
SHA-256: 5c525de4de0de64b984ccfdfccb97361e8b764bc45b2085b2a636ea35bf39535

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