Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d09b6e9a4b53b7…

MALICIOUS

PDF

64.5 KB Created: 2021-01-22 05:53:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5c9b985b25dcf58adc790877bf5bddef SHA-1: 53eecac8fda0c0bc48c80a2c6f41e1760d958c81 SHA-256: 54d09b6e9a4b53b7b466e3b964225c1fd0a656abfecd3a65158abc585e83641e
96 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'traffnew.ru', which is likely used to host a malicious payload or redirect to a phishing site. The PDF structure itself appears to be generated by wkhtmltopdf, and while no explicit script was found, the presence of external URIs and the high risk score suggest an attempt to exploit the user or deliver a secondary payload.

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://traffnew.ru/123?utm_term=jeep+grill+inserts+purple PDF link annotation
    • https://site-1176856.mozfiles.com/files/1176856/fear_house_vr_cardboard_game_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464542/normal_6002e824bf645.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493600/normal_5fe19ece4e46e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490961/normal_6007b1c8af9d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484126/normal_5fefdb6991f98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412408/normal_5fdb339b70144.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/eZtqhe0/magic_piano_pink_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411917/normal_5fe260967708f.pdfIn PDF document text
    • http://lajenasuwo.iblogger.org/christafari_gospel_songs_free.pdfIn PDF document text
    • https://site-1174826.mozfiles.com/files/1174826/75239317612.pdfIn PDF document text
    • https://cdn.sqhk.co/dedenijikal/qfSyhdu/zejunenevalux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kojodidekojamu.rf.gd/wood_platform_beds_made_in_canada.pdfIn PDF document text
    • http://tokafibalo.epizy.com/dream_league_soccer_2019_uefa_champions.pdfIn PDF document text
    • http://sesukunijekoti.epizy.com/sql_server_2014_sp2_evaluation.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_off0000bd51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD51 4764 bytes
SHA-256: bf4d324b61c3504ed78498f27828fad8d88796545089e62cdd805f56d9589db0
font_01_sfnt_off0000cd9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9C 11700 bytes
SHA-256: 925c2011ffeed97f438bb07984eded4176d7653e9b4da8aefb3078d3f9dd9468