Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d46a397fa947522…

MALICIOUS

PDF

73.9 KB Created: 2021-03-20 15:00:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccf64790d1cc0fe49180b308af4277be SHA-1: 81e4e6128e6a94ed7880a90077f0af4e14bc2a56 SHA-256: 8d46a397fa9475228d8c72b3118687fdda0b225856f4093d6ffdad047626fd80
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a URL that appears to be a lure for downloading software, likely to trick users into installing malware. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'wifikill pro apk without root', further suggesting a software-related lure.

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://ponafet.ru/wix?keyword=wifikill+pro+apk+without+root
    • https://cdn.sqhk.co/wejafivelij/x1lghji/widegetozemoxosux.pdf
    • https://cdn.sqhk.co/desogepupema/eiflilQ/kawolekajipev.pdf
    • https://cdn.sqhk.co/soredepel/hghcJhi/free_dc_superhero_girl_coloring_pages.pdf
    • https://static.s123-cdn-static.com/uploads/4365601/normal_5fce9757ab66a.pdf
    • https://static.s123-cdn-static.com/uploads/4384036/normal_6008c928e4556.pdf
    • https://cdn.sqhk.co/losomilodip/Uxvhezp/41952933775.pdf
    • https://cdn-cms.f-static.net/uploads/4383699/normal_6010926baad3b.pdf
    • https://cdn.sqhk.co/dajebala/gghjjcx/30246234525.pdf
    • https://cdn.sqhk.co/vefoxewijuja/gerggih/weather_app_iphone_wrong_location.pdf
    • http://lalevuw.mypressonline.com/sivodujokirom.pdf
    • https://cdn.sqhk.co/viwiratoposu/ib6BiOC/barbie_granny_mod.pdf
    • https://cdn-cms.f-static.net/uploads/4428035/normal_6031cee4df6cc.pdf
    • https://cdn.sqhk.co/podoxato/hfgdTwa/megijilidafamupuviwi.pdf
    • https://cdn.sqhk.co/sokavuwoz/fadiejj/dragon_island_race_game.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mizeteb/dedokozejodofoxum.pdf
    • https://uploads.strikinglycdn.com/files/395befe3-a608-4104-b0d4-d37c4f44a0dc/what_is_the_best_workout_to_gain_strengthen_legs.pdf
    • http://zilisidojaze.myartsonline.com/venel.pdf
    • https://uploads.strikinglycdn.com/files/f3baaea9-2e50-4de4-bc7d-54ddd7dd5a13/72186418958.pdf
    • https://s3.amazonaws.com/falejogajir/95440144111.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_off0000e4fa.bin
085fcebc8b8bb90b748cf261ed4236d1e30c8ce1640f7051c06a08b0aa10d87a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FA 4980 bytes
font_01_sfnt_off0000f605.bin
ceefe2e0e4c00305a80bd9c2738e7c590092e890360015149085598c4e32467d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF605 10744 bytes