Malicious PDF — malware analysis report

Static analysis result for SHA-256 113eead491e8cacd…

MALICIOUS

PDF

63.0 KB Created: 2020-11-18 12:12:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 932e88194eb184f614c68847f44d5b46 SHA-1: 3f7a8f001f8696f64245d9d94e8a4f70585f476e SHA-256: 113eead491e8cacd9623eb9b00d0aa54c078ae6324a3315a658a0351e4515c61
154 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to a known malicious redirector, traffking.ru, which is disguised as a driver download. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the malicious redirector strongly suggest an attempt to trick the user into visiting a compromised site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/aws?utm_term=synaptics+touchpad+driver++32+bit In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369164/normal_5fadc233166dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390385/normal_5f924dd27625e.pdfIn PDF document text
    • https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/f33ade76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380674/normal_5f9c17d76d7dd.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/0c1ebe54-2bb0-4a95-9c18-22e946bee531/kodid.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/19610936569.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/archeage_costume_synthesis_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d7481e1-6a5b-465c-a55e-9404c4aebd34/gugomarozaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4c670a0-8243-4c5d-9e62-6206f931d030/15218623172.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/agroforestry_types.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8b5a6b8-2a20-4077-8ee9-b4596c78f7f5/resistivity_of_constantan_wire_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/barney_i_love_you_song_sheet_music.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_off0000b8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8DB 5832 bytes
SHA-256: 0d8a3352157592d7d591665eb665388153aef859bfe3c19c2209eb308ba62b90
font_01_sfnt_off0000ccb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB2 10244 bytes
SHA-256: 414030e879965007e547ef4d73e2056d25348bc4265a7b8bf3bbc0466a41fb10

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