Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dc6e70507375296…

MALICIOUS

PDF

98.1 KB Created: 2021-04-12 05:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d7930a48b746f4fbddd4f45c3011a9e8 SHA-1: 0080b63ec7ac4cc4cf82f5f4221e52ce4d269833 SHA-256: 4dc6e70507375296439b4f47afbb3e865275f10ef4187d8d4101bec48fe6efea
104 Risk Score

Malware Insights

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

The file was detected as a malicious PDF phishing document by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a secondary payload. The document body, though heavily obfuscated, suggests a lure related to driver downloads, aligning with a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zajinet.ru/strik?utm_term=m-audio+projectmix+i%252Fo+driver+mac+sierra PDF link annotation
    • https://cdn.sqhk.co/lutaxudepoje/RJ015Q2/24227700060.pdfIn PDF document text
    • https://cdn.sqhk.co/felolavap/giigjYW/commuter_road_bike_handlebars.pdfIn PDF document text
    • http://gonadawu.22web.org/sixexuvifupabaka.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/hKjggk7/93012275455.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/netinuwa/leveling_guide_wow_classic_alliance_priest.pdfIn PDF document text
    • http://zodoxilasudut.epizy.com/51163052567.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/50592798878.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/androidx_flutter_error.pdfIn PDF document text
    • http://dotiribene.epizy.com/nitabemugaxodaxapiwoli.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/banjara_love_songs_mp4.pdfIn PDF document text
    • http://tofaveme.epizy.com/fikodanavozejin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af73c707-19fd-42c7-86da-735b382ebdb9/85499223616.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/does_cortisone_shot_affect_sleep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6f00fb6-147b-41cc-8f5f-460e301871a2/how_to_replace_saxophone_reed.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/pokomesupopi.pdfIn PDF document text
    • http://rozopujonabesix.epizy.com/6724933943.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/fuxesikoriwexinat.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/majinako.pdfIn PDF document text
    • http://lakasixes.rf.gd/attack_on_titan_season_4_episode_4_manga_start.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13533 5240 bytes
SHA-256: 790fa37f9c5a100d67da48138dffff4c943f42573635bb4495800ca97d25488d
font_01_sfnt_off00014728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14728 11200 bytes
SHA-256: 45f0d721373c5ca024ff2a5b14d9ed81152beee23f3080e74e20cd298f5302e1
font_02_sfnt_off00016d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D4D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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