Malicious PDF — malware analysis report

Static analysis result for SHA-256 5df4db3f215fd491…

MALICIOUS

PDF

85.9 KB Created: 2021-03-25 02:50:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7be94a1b4b68fe4f57fca98ca6a4a7d2 SHA-1: b2ac126eff3329db3b676e3d9478226a47cf91df SHA-256: 5df4db3f215fd49118ce1e73d23fbf9f7b748478fabcf2983cbdc12967b10a2b
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The PDF structure and metadata suggest it was generated by wkhtmltopdf, a tool sometimes used to create malicious documents.

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://jumiwimov.ru/wix?keyword=the+cancer+survivor%2527s+guide+%2528second+edition%2529
    • https://cdn-cms.f-static.net/uploads/4404500/normal_604a77fa2045b.pdf
    • http://visezuxopusifik.iblogger.org/12110752046.pdf
    • http://derapom.iblogger.org/6_trig_functions_unit_circle_calculator.pdf
    • http://zawuruliwisevo.iblogger.org/kobike.pdf
    • https://static.s123-cdn-static.com/uploads/4374369/normal_5ffd61abc0e3c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jedenibiripo.epizy.com/acura_mdx_2020_manual.pdf
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_8f05740d3bf845b592391dcbdfdd58e1.pdf?index=true
    • http://livukuxuperum.epizy.com/xamisuvupodaf.pdf
    • https://s3.amazonaws.com/zafaronivaj/moment_js_get_24_hour_format.pdf
    • http://vaxomuterok.epizy.com/vanapezexorateziwogesa.pdf
    • http://saziwujezad.epizy.com/how_to_get_rid_of_grass_ivy.pdf
    • http://kixomeremit.epizy.com/92889325616.pdf
    • http://sitiwaruto.rf.gd/magic_the_gathering_novels.pdf
    • http://mubapumasas.epizy.com/27625970886.pdf
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_75737cd3331c469396af937045cd3f77.pdf?index=true
    • https://s3.amazonaws.com/fezenur/77349044306.pdf
    • https://s3.amazonaws.com/pipaneku/3d_max_models_free_interior_restaurant.pdf
    • http://labazesunug.epizy.com/kavusiliku.pdf
    • https://a179b4bb-f9e1-4b0b-8685-f881d2afde68.filesusr.com/ugd/0fdb6d_49e4df1f387d4e088e1a36aed76dcc5d.pdf?index=true
    • https://s3.amazonaws.com/jevelel/zipotevifala.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_off000112ce.bin
dd515fd23b2ac6c4695c4cce08225c5c283e3222938930cd7c6491c295a4520e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112CE 5364 bytes
font_01_sfnt_off00012522.bin
92c74975f7b825b4405ebe64bf549cc097624e4e0c471072398cabf141982dc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12522 10780 bytes

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