Malicious PDF — malware analysis report

Static analysis result for SHA-256 30726377984aad48…

MALICIOUS

PDF

65.8 KB Created: 2020-12-08 03:06:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 765d7ae0f336fd89447db03930639911 SHA-1: 1fa2032094310f36997980a46c2868d7af8e0221 SHA-256: 30726377984aad48d40f06fed94eb3d3e2d98e0cb4b90ba42e80c7fe637195d7
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for credential harvesting or malware delivery. The document body, though heavily obfuscated, suggests a lure related to a 'prep guide'.

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://trafftec.ru/strik?utm_term=the+real+act+prep+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374371/normal_5f9cfc5830af3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446646/normal_5fc4da0d2c485.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365998/normal_5fc6222df278b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417519/normal_5fb8e30db3b63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380090/normal_5fbf541ab448a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421050/normal_5fa2dda80f94d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462096/normal_5fa18e4491cce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501961/normal_5fc1bd3cea30e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc07dde27a199023ab34438/t/5fc26e25fa04221c716e1fc1/1606577701754/lili_marlene_lyrics_marlene_dietrich.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc68d526b97992eb5827da1/t/5fc6c02ea3696915e20ddf69/1606860847278/fight_polish_card_game_1000.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1d3b3f9866f3fd2dadad4/t/5fc318de7acac6192a264f2d/1606621406429/98038473847.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12254405d5340f32af944/t/5fceb1e2b4902412734aa9b4/1607381475895/broken_bones_band_youtube.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58414a3bf4b14abc861b4/t/5fc79fe52ac13f1ee9c102ff/1606918117672/mx_player_apk_pro_mod.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc72e3dbcf5f06bcb77810c/t/5fcbbbc0a3bc3d191535d485/1607187393641/43191642725.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_off0000c7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BC 5108 bytes
SHA-256: d8dc44def206ad7c73d4fb9caf506638c211671483a890c6c2d2a08c0df483c5
font_01_sfnt_off0000d90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90E 9956 bytes
SHA-256: c3209713b64bb45dd9b060ad512efa2e42ae4523404f0afdca8abef0717dcbf6

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