Malicious PDF — malware analysis report

Static analysis result for SHA-256 3358b281542b0ff4…

MALICIOUS

PDF

75.8 KB Created: 2021-03-22 18:04:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86e613906b49151cc391e6de1e0fa21e SHA-1: 227a7f1c1b2254955a3f1453fcf24bc8b5fbf0e5 SHA-256: 3358b281542b0ff48449e31ff98efc705f70bc078c5a2a3ca1616f6a4245a281
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. It contains a large number of external links, many of which point to unknown or potentially malicious domains, suggesting a link farm designed to distribute malware or phish users. The ClamAV detection further supports its classification as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=analysis+of+the+poem+fisherman+mourned+by+his+wife
    • https://cdn.sqhk.co/denirinodo/d1a1bjb/79995962903.pdf
    • http://whalesqpa.fun/what_is_the_message_of_green_eggs_and_hamnrhcx.pdf
    • http://reduslim-italy.site/my_device_call_recording_settingsv2as6.pdf
    • https://cdn.sqhk.co/zubejavaxuvu/b8gfhux/79862038745.pdf
    • https://cdn.sqhk.co/kevovevude/dgj86tG/6760556106.pdf
    • https://cdn.sqhk.co/vilubofi/dwn3jdv/call_me_emperor_game_hack.pdf
    • https://cdn.sqhk.co/rularijulen/l4hdhdh/65106157928.pdf
    • https://cdn.sqhk.co/baxorurifina/SjgiiR4/84418452024.pdf
    • https://cdn.sqhk.co/mapelimujeku/bZwjfgh/throne_offline_mod_apk_unlimited_gems_golds_foods.pdf
    • http://healthyforczechrepublic.site/price_of_stihl_ms_180mb8sb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f00dc01c-b9cd-4c7c-921e-6bd37cbb77f8.filesusr.com/ugd/c068f8_8ce3a94cde914a4c8559ff0dd85784e0.pdf?index=true
    • https://44879a12-c10a-431c-a98a-7de142752d0f.filesusr.com/ugd/bb4607_75374b2dd3f44470a452c0427aac2127.pdf?index=true
    • https://s3.amazonaws.com/wivunonovef/eating_habits_of_animals_worksheet.pdf
    • https://s3.amazonaws.com/dofufiri/risoza.pdf
    • https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_a7c419417c944c32a9bb0afb43bc0afa.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5cd77e01-df95-437b-917a-9adb673e0c5f/jopokekejawosopod.pdf
    • https://2a403a33-5f6e-4534-96f9-742aa7325afc.filesusr.com/ugd/d2da83_4ac5dab832a24870a5e2b10fe0374828.pdf?index=true
    • https://s3.amazonaws.com/sezebepit/android_app_developer_course_in_chennai.pdf
    • https://uploads.strikinglycdn.com/files/0e68a61d-e1a6-4eee-b922-e43b6dd2457b/how_to_make_bookshelf_in_minecraft.pdf
    • https://uploads.strikinglycdn.com/files/4c2a96df-d7de-4080-851d-9f6a9b936f40/sodastream_fizzi_one_touch_sale_canada.pdf
    • https://4c80ca50-31de-4e6f-b265-471620011c4a.filesusr.com/ugd/08c6b7_317cd649c5414d89834376cd8608fc9e.pdf?index=true
    • https://s3.amazonaws.com/zerejibixupav/gunovapitamesepexewid.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_off0000ea98.bin
64a714e3614c098a7e312fb173c545e0bb28ebcf8ba3380249c46d274f156a1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA98 5604 bytes
font_01_sfnt_off0000fd8d.bin
2486f02eb311e220d25abbe40e64ab9f8bffc7341de23a57629b4090e9ec1db0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8D 10464 bytes

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