Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8672b4ae552f031…

MALICIOUS

PDF

71.0 KB Created: 2021-03-22 11:17:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eeb1e93650046e6ca4b3fc761817b84b SHA-1: bf2524db891103c81378793c8393c8d089265f23 SHA-256: f8672b4ae552f031166cc252fd812f1945f41b6ff9e76f6122483d816b13ecbd
126 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, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though truncated, mentions a book title and 'free download', reinforcing the lure for a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/wix?keyword=the+anointing+by+benny+hinn+pdf+free+download
    • http://unosital.space/74076126256pleah.pdf
    • http://sumovenelexefik.iblogger.org/how_to_check_ac_compressor_clutch.pdf
    • http://larokamexi.sportsontheweb.net/how_to_set_sharp_atomic_clock_time_zone.pdf
    • http://sopugepibimel.mypressonline.com/ruxaduvoburofemapos.pdf
    • http://torixobo.mypressonline.com/xunene.pdf
    • http://ourfanz.com/employment_application_form_templatedfy8w.pdf
    • https://cdn-cms.f-static.net/uploads/4371261/normal_5fd89ec60d0d7.pdf
    • https://static.s123-cdn-static.com/uploads/4417045/normal_5fcb4d3ea345e.pdf
    • http://todayshop.website/soborevonodenitaxsesar.pdf
    • http://redpandarecycling.com/strikemaster_40v_ice_auger_for_salekem05.pdf
    • http://sodaapp.pro/94407263983p1og8.pdf
    • http://lezigovedavide.getenjoyment.net/jpg_to_online_zamzar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bapinusajix.rf.gd/intuition_pumps_and_other_tools_for_thinking_free.pdf
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_7f8bef1093b64996bde4bb89f15477fb.pdf?index=true
    • http://xemigososefof.atwebpages.com/connect_acurite_to_sensor.pdf
    • https://47c0d0ed-94e3-447f-940a-e265262d053f.filesusr.com/ugd/a43ec6_e569981e54264e519c71d6974a67049c.pdf?index=true
    • https://ec560393-4650-4708-bf0c-d08fceb8458c.filesusr.com/ugd/ca69db_c0cc23b6565e461d9dcbca4ac6a12846.pdf?index=true
    • http://gurunetotej.rf.gd/dyson_ball_multi_floor_canister_vacuum_parts.pdf
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_4ce9f546898747418bb4b18eaa4e5c12.pdf?index=true
    • https://be08d7d4-326a-4801-be9d-4496af17a43b.filesusr.com/ugd/d31907_80a3de01c366411d9f9930a80e914869.pdf?index=true
    • https://a1d3e036-d9a1-4be1-9d2f-eedbb581cb22.filesusr.com/ugd/3ce946_57bb72d16f674d7f854c2f621dbb47b1.pdf?index=true
    • 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_off0000d6e9.bin
e8ef6ca570da642b2bc27d3462d5b7dabdeb97615a0e7bf994cb60719c2097b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E9 5408 bytes
font_01_sfnt_off0000e961.bin
a2d2f9eb6061db0aa3f616feff36cfb84256ed6b62f57e6e2f4fcf6348c6895f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE961 10800 bytes

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