Malicious PDF — malware analysis report

Static analysis result for SHA-256 313da026ec8d4a2d…

MALICIOUS

PDF

83.1 KB Created: 2021-04-16 08:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5af58c2ba6c4c0f4b88bee1a1b495ca SHA-1: 9bfbfa5a5f3e7045634bb0ac57611f32b4f646e1 SHA-256: 313da026ec8d4a2dcbb0fbfe7adc0b4519b889e71448469bbe6e58eb477298db
96 Risk Score

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 external URI pointing to a suspicious domain, which is likely part of a phishing campaign. The document body, though heavily obfuscated, contains text related to search terms, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dafemum.ru/strik?utm_term=delonghi+dehumidifiers+australia
    • http://delayikapy.xyz/patevosu4adae.pdf
    • http://kayikciakademi.com/chrysanthemum_flower_pic5ysk6.pdf
    • http://jusapp.club/16367870457v8gz0.pdf
    • http://xumugawejal.scienceontheweb.net/tipp_distress_tolerance.pdf
    • http://meleworofazob.22web.org/3702284711.pdf
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdf
    • https://cdn.sqhk.co/fupipevu/jLjgzsG/racemenu_sculpt_tutorial.pdf
    • http://help-violation.com/cambridge_math_book_grade_10zpqmb.pdf
    • http://criticcxck.space/puwitejufofibujek033ms.pdf
    • http://kesisofawa.mygamesonline.org/what_is_the_teachings_of_don_juan_about.pdf
    • https://cdn.sqhk.co/wojipezusax/AhiKjgk/wosuzes.pdf
    • https://cdn.sqhk.co/verexumifo/jxhiUjc/busowirozeju.pdf
    • https://cdn.sqhk.co/wirujurumugi/Dfhbrjb/divarty_fort_carson_address.pdf
    • https://cdn.sqhk.co/xufojidaju/hg7ShjF/dujareditefizakaduk.pdf
    • http://aires.fun/percy_jackson_characters_birthdaysof49p.pdf
    • http://rujokevawevi.22web.org/frosty_the_snowman_chords.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zijedan.atwebpages.com/gegote.pdf
    • http://vipifusofired.epizy.com/sasomufejideleta.pdf
    • http://bumisalozik.rf.gd/washington_dc_circulator_map.pdf
    • http://munogotisun.epizy.com/15009519038.pdf
    • http://werolalijatet.rf.gd/9229610065.pdf
    • http://wovuluvoju.onlinewebshop.net/central_consumer_protection_council.pdf
    • http://movasedumanepe.onlinewebshop.net/asterix_portugues.pdf
    • http://wijarixeva.rf.gd/susopafopuvinupedizaxulu.pdf
    • http://terujak.epizy.com/mitsubishi_xpander_carguide.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_off00010660.bin
8ea53276d93ce07a25a4d89b6029883f862de9954bb8d588e569433e6845a363
pdf-font-stream PDF embedded font (sfnt) at offset 0x10660 5320 bytes
font_01_sfnt_off0001184c.bin
cec91bd76187b880060b83aa7345237d725ca517b6164172806c3ced07ca2422
pdf-font-stream PDF embedded font (sfnt) at offset 0x1184C 11276 bytes