Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d98102c53a54b1c…

MALICIOUS

PDF

78.1 KB Created: 2021-03-16 05:33:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: faec5ce8a7f63057a9f9870a9a78c645 SHA-1: 67ee9a822533bbc2f136adbefd5431307c3b3340 SHA-256: 9d98102c53a54b1cabd07ba1419812b043ad13011060f65a34f20d445acc0693
126 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, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farm heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=why+isn%2527t+my+sodastream+fizzi
    • https://gikenizebos.weebly.com/uploads/1/3/4/7/134706738/fejizo.pdf
    • http://wudazex.sportsontheweb.net/91314137239.pdf
    • http://reduslim-europa.site/95364265222wky6b.pdf
    • http://topcreditcheck.info/arithmetic_and_geometric_sequences_word_problems_worksheetievnm.pdf
    • http://busimaderule.mywebcommunity.org/foscam_fi8910w_reset_password.pdf
    • http://itfamily.info/baxikuzileripeterasxi3n4.pdf
    • https://bovatukal.weebly.com/uploads/1/3/0/7/130739183/torijorijelezuvabasi.pdf
    • https://raputaluwim.weebly.com/uploads/1/3/1/6/131606275/pobabewevesola.pdf
    • https://matelusa.weebly.com/uploads/1/3/1/4/131406649/8381234.pdf
    • http://power-guard.shop/honda_lawn_mower_front_wheel_repair1zqrz.pdf
    • http://pusapev.scienceontheweb.net/56520634957.pdf
    • http://copyrightshelpcenter.com/how_do_i_turn_the_alarm_off_on_my_g_shock_watchhtlvi.pdf
    • http://qrettalq.online/play_ninja_turtles_fighting_games_onlinew01qj.pdf
    • http://rubisteq.online/96705482250qdmsk.pdf
    • http://digovin.getenjoyment.net/44774494879.pdf
    • http://tk-pobeda.site/vamesivqt6i.pdf
    • http://wamuwosola.mygamesonline.org/dumozopidusewifota.pdf
    • https://puxodemidumez.weebly.com/uploads/1/3/5/3/135345879/c8bdafb5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/4f50201b-73f9-4e52-b39b-5108085c7890/21441319217.pdf
    • https://uploads.strikinglycdn.com/files/847bdf17-582a-4166-a615-2c2319c3a9ba/48180718294.pdf
    • https://uploads.strikinglycdn.com/files/0b2df25a-28fb-4a40-9ac6-0de283949042/citizen_mens_eco-drive_titanium_watch_blue_bm7170-53l.pdf
    • https://uploads.strikinglycdn.com/files/499075fa-3861-44d6-9513-b4b230c17aaa/83244542980.pdf
    • https://uploads.strikinglycdn.com/files/55e7cc64-85c8-414a-967a-615cf3ae017f/62264258957.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e63e.bin
611ba4abfa1c5da8e14c033c29d69720febe4ff2ef9cfee7722a35fc74e46b47		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE63E 5104 bytes
font_01_sfnt_off0000f778.bin
1a1225bedef497616b5f630b0d00f18b2ac31f6b282b224838d389e9b11dde66		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF778 10448 bytes
font_02_sfnt_off00011b30.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B30 4324 bytes

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