Malicious PDF — malware analysis report

Static analysis result for SHA-256 98bd35edd739be78…

MALICIOUS

PDF

73.7 KB Created: 2021-04-04 08:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df7e0def99389e63a3ed2c03e06d974c SHA-1: e31fa80edcfb24eb09ef5796e3638bae2732a683 SHA-256: 98bd35edd739be789a8b81dc406d4a54e79cad2150726696e9f3d364805c974f
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'grade point average' and embeds a URL pointing to a suspicious domain. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The embedded URL likely serves as the initial stage for delivering a malicious payload or redirecting the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://seumenha.ru/strik?utm_term=how+to+average+grade+point+average
    • https://cdn.sqhk.co/vovewotutal/ifhiSdC/88529145452.pdf
    • https://cdn.sqhk.co/zobelekivix/Wib7hjb/arknights_wallpaper_iphone.pdf
    • http://natalonofawoba.22web.org/tunizitusatanutezibatek.pdf
    • https://cdn.sqhk.co/kobadaxo/Wjijchh/fuvisomewapexububuno.pdf
    • https://cdn-cms.f-static.net/uploads/4374708/normal_5fd23886dc471.pdf
    • https://cdn.sqhk.co/niserutom/GcIGCjc/hack_idle_train.pdf
    • https://cdn.sqhk.co/putizimetiwe/ighdNjf/nbc_sports_gold_activate_xbox_one.pdf
    • https://cdn-cms.f-static.net/uploads/4459175/normal_602c0042db3af.pdf
    • https://cdn-cms.f-static.net/uploads/4378836/normal_6066d90a83eef.pdf
    • https://cdn-cms.f-static.net/uploads/4413575/normal_60185ca3d6b99.pdf
    • https://static.s123-cdn-static.com/uploads/4480414/normal_5ffca2dcc4d1d.pdf
    • http://xiweloju.22web.org/11140953191.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2423c29c-eef2-4a08-a0c8-5cbf99a6c82e/lawasotawomufav.pdf
    • https://s3.amazonaws.com/xeruxaxer/oecd_beps_cbc_reporting.pdf
    • https://s3.amazonaws.com/timeziso/65314738938.pdf
    • http://merowijesajov.epizy.com/mofugeruwu.pdf
    • https://uploads.strikinglycdn.com/files/ac6f8a4d-0a35-4162-8170-ff33aa8b5944/pepunajop.pdf
    • https://uploads.strikinglycdn.com/files/19e4d8e2-14e4-403f-bf2c-a9e1a5aa4a6d/gumilukaxokudumobile.pdf
    • http://daxevetefixidaj.epizy.com/beyonce_broken_hearted_girl_music_video.pdf
    • https://uploads.strikinglycdn.com/files/bc8aa7c9-5785-4365-b3f5-3b4d0c4cbcc8/38087867902.pdf
    • https://s3.amazonaws.com/kosamupim/gidisefojezivoj.pdf
    • https://s3.amazonaws.com/debiwelof/13651193042.pdf
    • https://s3.amazonaws.com/devuxuzejozam/angular_formgroup_validator_function.pdf
    • https://uploads.strikinglycdn.com/files/d0c99ad9-b0d1-4eac-a1c6-27ca11a3aee5/does_costco_have_keurigs.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_off0000e33e.bin
4a4ac5791b9e6f7739ab3cb17ffd9163c61c4b51e2e34fcab287b8ad09a924b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE33E 5028 bytes
font_01_sfnt_off0000f481.bin
36f97fe66a22bb01ca89688155f123e6bc42e9ecc4f172112b10fbd673b1de18		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF481 10780 bytes

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