Malicious PDF — malware analysis report

Static analysis result for SHA-256 11628d1670ed354c…

MALICIOUS

PDF

62.0 KB Created: 2020-11-22 22:03:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 314e7d455e767f7cb1b4b412ce0dddd6 SHA-1: ef3e7286c7fbfbc2851b3d76ee7b4e8e15554398 SHA-256: 11628d1670ed354c70ac41e22a56766d54f56c6a2a6d66b16c7d5844beb36dab
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is classified as malicious by ML and ClamAV. The document body, though heavily obfuscated, suggests a lure related to a 'Nestle water cooler manual'. The primary IOC is the external URI pointing to 'trafftec.ru', likely serving a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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://trafftec.ru/123?utm_term=nestle+water+cooler+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380871/normal_5f90434ecb7ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377678/normal_5fae9ff718a4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445114/normal_5f9ea45159321.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/399befc9-9e50-442d-8689-03f5636e3039/kozobivaposovitozel.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/letokujebanuluwiv.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/amapiano_2019_datafilehost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1557b800-bd7d-4bc2-99c3-81e437effb96/57279414283.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20757b8c-1572-41b7-aaa1-52656f98c720/fogonefikoxufep.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/nojogu.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/madden_08_pcsx2_fix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10cc05cc-1820-4e29-949e-ef482c175b54/world_of_warcraft_books.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_off0000a86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA86E 4840 bytes
SHA-256: 99366f48cf5d0f26c7ffc85d4610ba3b4cee23f7094fd6790daa2eb58f964f40
font_01_sfnt_off0000b8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8D6 10388 bytes
SHA-256: 46ced2e761e66ed27816d86e030c6638624fd82591114fa62025cb1034d027ad
font_02_sfnt_off0000dbd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD4 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361