Malicious PDF — malware analysis report

Static analysis result for SHA-256 43bb24c633e7327f…

MALICIOUS

PDF

67.1 KB Created: 2020-11-23 18:27:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8aebcca0746382809991c05fcc8e50aa SHA-1: 54e458994992e748f6c9c52e608547039309c7ee SHA-256: 43bb24c633e7327f15d9914d77119e1beabd906af2fc0210089fd1e89ee8914f
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL, https://trafffe.ru/123?utm_term=whack+my+phone+unblocked+games, is the primary indicator of compromise, likely serving as a lure to a phishing or malware distribution site. Although no scripts were extracted, the PDF structure and embedded URI suggest an attempt to trick the user into visiting a malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/123?utm_term=whack+my+phone+unblocked+games
    • https://cdn-cms.f-static.net/uploads/4373516/normal_5f8e83c8e82ce.pdf
    • https://cdn-cms.f-static.net/uploads/4504870/normal_5fbba1ba7c882.pdf
    • https://cdn-cms.f-static.net/uploads/4367916/normal_5f97e6e3b3266.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8d8e0198-1d17-420e-9416-03571c845bcf/82277606015.pdf
    • https://uploads.strikinglycdn.com/files/43db4b52-4c1f-432a-a60d-c28b91a97326/60222483758.pdf
    • https://s3.amazonaws.com/gadumagabusodel/vajidewunobexudinaxi.pdf
    • https://uploads.strikinglycdn.com/files/587f282e-8b60-43ef-91cc-15942ced40dd/46894523151.pdf
    • https://s3.amazonaws.com/gotenukevepunin/17074511955.pdf
    • https://uploads.strikinglycdn.com/files/b6042538-ff73-4416-979b-1663e2716eb6/funeriwadotugisowubedikud.pdf
    • https://uploads.strikinglycdn.com/files/6287b8f7-402f-4e05-a546-cdf30e49694e/mekileweronazif.pdf
    • https://uploads.strikinglycdn.com/files/57837759-ebf9-4e8d-b275-65f0fa8f1714/kavelotudugunifiduseka.pdf
    • https://uploads.strikinglycdn.com/files/3a64698c-b567-4373-8d5c-6d23f1f1238a/what_does_oxenfree_mean.pdf
    • https://uploads.strikinglycdn.com/files/aff29dc8-6ea9-4346-befd-30dfa2f119e0/25020005873.pdf
    • https://uploads.strikinglycdn.com/files/e97dfb12-d271-40b5-9511-199f2c1d8d13/billable_expense_income_vs_sales_of_product_income.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6ff.bin
7651cf15ff936849d401bc1ad7967c8ca70d98a10faace8b9f12ade41bae3ac4
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6FF 5712 bytes
font_01_sfnt_off0000da54.bin
9e9c6d329015dcb1b389ec2fd2a1470679b2188be6a55ce6b7063745052d0c1d
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA54 11544 bytes