Malicious PDF — malware analysis report

Static analysis result for SHA-256 1930633826f7a4b3…

MALICIOUS

PDF

74.4 KB Created: 2021-03-21 06:52:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 478dd30f1cc4183449d9e44ce48c8a0e SHA-1: b2cbb8c1d5f0b2ee2aebeaa73d08e1be6b3e5b2c SHA-256: 1930633826f7a4b3e825196a3fd9ceb6f2911be1640755090d2ae8e78046dd8b
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Credentials from Password Stores T1059.007 JavaScript

The file is a PDF document flagged by a machine learning classifier and ClamAV as malicious. It contains heuristics indicating an urgency lure and an MFA/one-time-code harvesting lure, suggesting a phishing attempt. The embedded URL points to a suspicious domain, likely serving as a landing page for credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/award?keyword=free+books+pdf+download+app
    • https://cdn.sqhk.co/litalile/hajeT9m/papers_grade_please_online_free.pdf
    • https://cdn.sqhk.co/fugovigul/aijxwmm/2388583183.pdf
    • http://jalazekesofijot.medianewsonline.com/93407779080.pdf
    • https://cdn.sqhk.co/kinanekoxo/id1gfjg/emotion_bingo_free_printable.pdf
    • https://cdn.sqhk.co/xojurolaruk/eggihgc/84394933325.pdf
    • https://cdn.sqhk.co/tenokesime/jeaibhc/dungeon_knight_vr_gameplay.pdf
    • https://cdn.sqhk.co/zuxeromewime/UTOeahe/new_bollywood_song_ringtone_2019_free_download.pdf
    • http://wugumonisukanib.sportsontheweb.net/gidobo.pdf
    • http://wipunemobak.mygamesonline.org/oceanic_pro_plus_3_review.pdf
    • https://cdn.sqhk.co/puburikob/hgeiigD/26409912265.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/45e4bd48-7b7f-4e5e-b36e-5f9d07c69fa4/63148959762.pdf
    • https://uploads.strikinglycdn.com/files/3d025ce8-451b-4cae-aec6-e5dd8373aa31/towus.pdf
    • https://uploads.strikinglycdn.com/files/f06be9de-37a5-4b6e-a6e0-155c9bb9a0a1/57527000197.pdf
    • https://uploads.strikinglycdn.com/files/5d096063-14b1-4f0d-a887-5d2469096eee/my_grandma_got_run_over_by_a_reindeer_movie.pdf
    • https://uploads.strikinglycdn.com/files/344a5d38-bd8e-4256-b70a-956602278a06/doragoped.pdf
    • https://uploads.strikinglycdn.com/files/7f865a79-705b-4d15-9eb9-6682f673bb53/saziriwamuwuxufewakenakev.pdf
    • https://uploads.strikinglycdn.com/files/d529a59b-1a12-43bf-8ee8-9faaeb1e4581/produplicator_warning_source_error.pdf
    • https://uploads.strikinglycdn.com/files/1ccc7663-b458-4d4e-977b-37ca6cd85716/20232766043.pdf
    • https://uploads.strikinglycdn.com/files/e1163cb0-aa2b-49b7-97aa-421519a6c25d/geometry_dash_online_free_full_version.pdf
    • https://uploads.strikinglycdn.com/files/998cba3a-c09b-4edb-96e1-60fdd94915f5/nowekevapator.pdf
    • https://uploads.strikinglycdn.com/files/9ed891a7-0c0f-4f7c-ab68-5c6843966dea/autocad_reader_free_download_windows_10.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_off0000e698.bin
c7ff752102ec89c5f0310993c1747fefabc044af2bcb2a61e7508707782fa47b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE698 5288 bytes
font_01_sfnt_off0000f8b3.bin
736e05c35c00504e4d33a9edcf0f160828960325352a3269ff86db66d748ed30		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B3 10372 bytes

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