Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b443d634e53e99b…

MALICIOUS

PDF

76.6 KB Created: 2021-04-02 06:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16e047ae8779b3541967251a8bf08f7f SHA-1: 2a49e75549e4bcb62f707e03cd96a93ed9ff7244 SHA-256: 8b443d634e53e99bc14650884ca6798134935e53413a3797651610fa54dcb1ed
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading further malware or submitting sensitive information. No scripts were extracted, but the presence of a malicious URI strongly suggests a phishing or credential harvesting attempt.

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://zajinet.ru/123?utm_term=application+form+example+word
    • https://rovoduwomu.weebly.com/uploads/1/3/5/3/135332400/4203913.pdf
    • https://cdn.sqhk.co/kososojog/PWi2jfI/xojuvowaxuguxigik.pdf
    • http://timujegewaverun.22web.org/ffxiv_chocobo_dyeing_guide.pdf
    • https://cdn.sqhk.co/gaxudofexal/jjiKLic/infobells_tamil_songs_kanmani_rhymes_offline_download.pdf
    • https://cdn.sqhk.co/lefuwaregew/RjbihDC/bouncy_ball_advert_song.pdf
    • http://jixaravaxagisuf.22web.org/72770134821.pdf
    • https://kasuvimifimo.weebly.com/uploads/1/3/1/6/131637099/wutogiga-finifuditano.pdf
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/ropad-danalukijunek-vupopexurikuzu-vexetujof.pdf
    • https://cdn.sqhk.co/bikolazasir/4vhiWjb/xbox_gaming_chair_australia.pdf
    • https://cdn.sqhk.co/wanukawuwota/M6gdf43/feloregijipa.pdf
    • https://gixujadimi.weebly.com/uploads/1/3/4/7/134708567/6128462.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wizidimawag/can_you_reheat_cooked_pasta_in_microwave.pdf
    • https://uploads.strikinglycdn.com/files/9bd9bfc7-7ad6-4c37-8beb-8411f9bf2051/pokeboroxuguzaxonaxulan.pdf
    • https://s3.amazonaws.com/lowuwofuxali/zokunarusavitavopux.pdf
    • https://uploads.strikinglycdn.com/files/23c3a4fb-afcf-45b7-a974-840590801d34/jamurexozefuvima.pdf
    • https://7095e710-59ac-4d27-8a5a-f3bbcaf65deb.filesusr.com/ugd/418e76_43a467e676564bc9869b3ec15370e33a.pdf?index=true
    • http://zokekoja.rf.gd/88531076774.pdf
    • https://6739ca04-605d-4ff4-b4c9-4e5bd75a7819.filesusr.com/ugd/031dda_aad2d62034c14fa98ec497e1e335e059.pdf?index=true
    • http://kagilabitivibe.epizy.com/85385032430.pdf
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_3f506ce550254815a7ac37784514d2af.pdf?index=true
    • https://s3.amazonaws.com/punagilelabon/norekajiwiko.pdf
    • https://uploads.strikinglycdn.com/files/92c8cc67-5e7c-4da5-8313-f4a5294a7a65/85871562722.pdf
    • https://s3.amazonaws.com/kukazowox/how_to_find_delta_hvap.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_off0000ede2.bin
8a8e9b2938e657d7a5e0c111114f330c148d032da40a31a9a700b746bd639829		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE2 5272 bytes
font_01_sfnt_off0000ffd6.bin
5c84dc8d82014b273ac96f3a36195d7ca7f0fc1af5f095b831c40385f7d7c998		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD6 10564 bytes

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