Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff4f3c572cfdf9e6…

MALICIOUS

PDF

61.1 KB Created: 2020-11-24 08:03:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16d00430ab1d6cbc31204493188b1672 SHA-1: 6d157e0706c0fff3926b5f6c98fede44597d9fc3 SHA-256: ff4f3c572cfdf9e653fd7c0a8b4e655964aa9d3a230733d2e8103c84e7306c2c
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://traffset.ru/123?utm_term=half+orc+male+barbarian+miniature', which is likely intended to redirect the user to a malicious site. No scripts were extracted, but the presence of the malicious URL and the detection signatures strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffset.ru/123?utm_term=half+orc+male+barbarian+miniature
    • https://cdn-cms.f-static.net/uploads/4488092/normal_5fb721a1596f2.pdf
    • https://cdn-cms.f-static.net/uploads/4384160/normal_5fb27b69cb6c1.pdf
    • https://cdn-cms.f-static.net/uploads/4471996/normal_5fb57bc68d03c.pdf
    • https://cdn-cms.f-static.net/uploads/4393511/normal_5f8f99ce4b000.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wotodedaruzuk/tamil_yogi_2019_movies_free_download.pdf
    • https://uploads.strikinglycdn.com/files/2e6bb46c-ec37-42eb-afda-9f1fd48c67a8/the_lover_duras_goodreads.pdf
    • https://s3.amazonaws.com/mubefula/38268329909.pdf
    • https://s3.amazonaws.com/degisapemifa/zutofavosirerikasegopowam.pdf
    • https://s3.amazonaws.com/pizivurapab/what_are_the_main_characteristics_of_modernism.pdf
    • https://s3.amazonaws.com/libosokune/rbind_vs_cbind.pdf
    • https://s3.amazonaws.com/joterige/gbs_cidp_guidelines.pdf
    • https://s3.amazonaws.com/napisakaluja/driver_license_number_by_state.pdf
    • https://uploads.strikinglycdn.com/files/0452d3a4-a575-4dce-8904-e5b30fb8cf8a/r_for_windows_3._3._3.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_off0000b1e6.bin
04887a9c19ac299e718ec8023eda2f75cdf31143558129841d93c8d1539c20c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1E6 4948 bytes
font_01_sfnt_off0000c2a4.bin
8c1fd3325526bcf1f60752c514df1d953800fef28e5ffca24aba69ddd2435e68		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A4 10928 bytes

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