Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b71ea704930113c…

MALICIOUS

PDF

65.4 KB Created: 2020-12-06 10:53:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ac49560c4a2d046602c1601c7ec567c9 SHA-1: e2e70f2b4a4bf0883b93a6695e9741a132deeb1e SHA-256: 3b71ea704930113c484cf7e378f6de9a7fde4ed8ef12dbf0938889a1c11287bb
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafficel.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'Wing sauce nutritional information' to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/aws?utm_term=wing+sauce+nutritional+information PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416787/normal_5fb381ef0f53a.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/fff651f2-d6e9-4e49-87cf-b2f62341ebd4/zosetovozowenuli.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/best_icloud_mail_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/poduvuladiweg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58b9fcb6-684b-4b68-b9ec-b2ed1f92395e/vojobok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6541b943-67b4-416d-b57a-3bca59fc3c29/64317998456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6cdd285-a652-49c0-99d3-4ca0949646bf/9790717208.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/castilla_albeniz_guitar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c15053de-b18a-43af-a78f-9c17555c48c7/5646419737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85b1e62c-bbf3-4e38-99a5-f634955498da/83544572228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7bb5e6d-9302-4f73-a4a7-b8a9e34cbd7d/97423698281.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_off0000b690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB690 5096 bytes
SHA-256: fd7c2213f14b11b96604f4e07faf69ac2a73458574f73a635bb184c770644688
font_01_sfnt_off0000c7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D4 10172 bytes
SHA-256: b2d1cd9d35b700212c57662b0a321bef2c7598a7efbb1e565df3638059c48933
font_02_sfnt_off0000eaaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3