Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a43332c91daa1c6…

MALICIOUS

PDF

76.9 KB Created: 2021-03-29 21:55:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4629b22fa8d02836c053bff938099b0e SHA-1: aface5452299bae3a4082a6cbff7445883f457d0 SHA-256: 7a43332c91daa1c6a43822c8574bee8859a9a3a7ba1c900d4b73272c31be4908
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document body, though heavily obfuscated, contains text related to a search query, suggesting a lure. The presence of multiple embedded and external URLs, including one pointing to 'nipisod.ru', strongly suggests the document is designed to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/strik?utm_term=what+is+calzone+made+out+of
    • https://cdn.sqhk.co/wibononuve/gcghmSv/kovusuwalepu.pdf
    • https://cdn.sqhk.co/gobenebovi/chfhCg8/4860898573.pdf
    • https://cdn.sqhk.co/zowuvutevak/p96TwEO/litimaxedesaludemekofiro.pdf
    • https://cdn.sqhk.co/xamitarerivu/aAjciep/.pdf
    • https://cdn.sqhk.co/dijogiper/8ibFshd/relepuwa.pdf
    • https://cdn.sqhk.co/lopijikuvi/heViEZ1/star_wars_galaxy_of_heroes_hack_apk_ios.pdf
    • https://cdn.sqhk.co/vasibejovej/Iibhhjh/2015_thai_hypertension_guideline.pdf
    • http://lexaxak.mywebcommunity.org/dell_1610hd_lampa.pdf
    • http://sebevifa.getenjoyment.net/83254003578.pdf
    • https://cdn-cms.f-static.net/uploads/4382629/normal_5fd7d730090fc.pdf
    • https://cdn.sqhk.co/voxobidivel/Rtharhi/shopdisney_coupon_november_2020.pdf
    • http://zumewidife.mygamesonline.org/what_are_some_good_topics_for_an_argumentative_essay.pdf
    • https://static.s123-cdn-static.com/uploads/4403127/normal_6004856c9166c.pdf
    • http://lidekuzadapuvi.22web.org/bendy_and_the_ink_machine_mobile_apkpure.pdf
    • http://jadogaxarabu.mygamesonline.org/how_many_watts_does_a_samsung_32_inch_lcd_tv_use.pdf
    • https://static.s123-cdn-static.com/uploads/4413693/normal_5fe022cc0309a.pdf
    • http://nalodorepuwag.getenjoyment.net/wedakafonumabin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4b888ca8-c1a2-45ca-9575-5ff23db5eec5/runipe.pdf
    • https://uploads.strikinglycdn.com/files/bcd263c0-c414-4c51-aa53-2a472f27b4e0/pejowonun.pdf
    • http://jefesati.rf.gd/46938442731.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_off0000e89c.bin
45f87b63a94575898c7a81cf3230e69661fa367dafc1df8d1950afe389a17369
pdf-font-stream PDF embedded font (sfnt) at offset 0xE89C 5228 bytes
font_01_sfnt_off0000fa58.bin
a5a711e42d8a89b95ee7ee96d2160a775f269c4df08af0bb18a277fb4e0d7912
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA58 13980 bytes