Malicious PDF — malware analysis report

Static analysis result for SHA-256 f713e095ebc93e24…

MALICIOUS

PDF

71.5 KB Created: 2021-03-10 17:21:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea8c52d7b4a479dbbc179de364926166 SHA-1: 80fff5b324697ba2ded4b6f62be8664d7a7396a2 SHA-256: f713e095ebc93e24ce3b853cc1ffe329958bedf19b69f1e161a1a22c51a3076d
96 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with the primary one being zajinet.ru, disguised as a search result. ClamAV and ML classifiers flagged this PDF as malicious, indicating a phishing or trojan distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/wix?keyword=the+adventures+of+huckleberry+finn+ar+test+answers
    • http://wepijafiguwenan.mywebcommunity.org/ge_ultrapro_universal_remote_control_codes.pdf
    • http://freshka.fun/free_calligraphy_script_fontsbgntx.pdf
    • https://debasomi.weebly.com/uploads/1/3/0/7/130739769/papojar.pdf
    • https://woxamaxepid.weebly.com/uploads/1/3/0/7/130776503/7359745.pdf
    • http://dosijefa.mypressonline.com/zexesaziwamavaliporu.pdf
    • http://vuwimoxit.mygamesonline.org/37984796895.pdf
    • https://cdn.sqhk.co/xabiximakef/jaCv8PM/39539190836.pdf
    • https://gapojusegora.weebly.com/uploads/1/3/1/4/131408170/sakajimutokirakol.pdf
    • https://cdn.sqhk.co/jarixizotib/hidohhf/flights_to_hawaii_from_houston_round_trip.pdf
    • https://cdn.sqhk.co/tajudozizif/AGzLcjd/transferwise_money_transfer_rates.pdf
    • https://cdn.sqhk.co/purilusevike/jhelHid/49155798814.pdf
    • http://werikipirojenob.scienceontheweb.net/8809813308.pdf
    • http://geleostone.online/english_grammar_test_for_class_81g3l6.pdf
    • https://kolabonedabisam.weebly.com/uploads/1/3/4/3/134398983/debabov.pdf
    • https://wolagevujizerul.weebly.com/uploads/1/3/5/3/135316080/nigekowiruwe_rudujumiwikutan_mevasulusilid_natositudumuwi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/000b36e3-6378-4152-8ddf-44ebb5f3f279/gevexunulevenokafidifi.pdf
    • https://uploads.strikinglycdn.com/files/45fdde92-1e6f-47c7-a998-e4254880ff0e/ninowaxurutalug.pdf
    • https://uploads.strikinglycdn.com/files/06baf07c-d4e0-4051-a896-86468fdf5f5d/54026178579.pdf
    • https://uploads.strikinglycdn.com/files/d000ae7c-f194-47d1-9002-86a61303bbd2/2014_chevy_malibu_led_tail_lights.pdf
    • https://uploads.strikinglycdn.com/files/756baed5-50df-4702-b258-c3ddbb8010d8/307779541.pdf
    • https://uploads.strikinglycdn.com/files/ca614bef-52f2-481d-bf1a-e48bb7ef0fdf/72591018032.pdf
    • http://vebagakid.onlinewebshop.net/rain_bird_5000_sprinkler_adjustment_tool.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_off0000ce5b.bin
e804b2b1f2f531e5cd7a4bc5859a0030a2d06c92d4fe8e70d234fb2160d3258e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5B 5400 bytes
font_01_sfnt_off0000e0c0.bin
90a77a8ffd7dc7c574a72f0dcd395f94b68369d8eddd29ede5e031c4f2802cf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C0 9848 bytes
font_02_sfnt_off0001025c.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1025C 4324 bytes

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