Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fbc711b83a85731…

MALICIOUS

PDF

69.6 KB Created: 2021-03-11 12:31:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7e0559380707d3a0c29c572e4d3cf877 SHA-1: 573e2e2712b5e4119dc41dbf1eef1d3e9b164046 SHA-256: 7fbc711b83a8573162add1346d4676c29a9e039a89cb628743b900e1e6694c86
124 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates it functions as a link farm on disposable hosting, with one primary URL being https://soxebez.ru/aws?utm_term=2012+amc+10a+solutions+pdf. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, further supporting the link farm hypothesis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9350

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
  • 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
  • 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://soxebez.ru/aws?utm_term=2012+amc+10a+solutions+pdf PDF link annotation
    • http://ketoxitigojaluk.sportsontheweb.net/3338883289.pdfIn PDF document text
    • http://wabaxifejem.sportsontheweb.net/yo_amo_a_paquita_gallego_capitulo_31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377095/normal_5fcb69d066ae5.pdfIn PDF document text
    • https://cdn.sqhk.co/somisafeg/adjivvQ/defender_1997_price.pdfIn PDF document text
    • https://cdn.sqhk.co/sebetite/XL9ibEc/dual_universe_release_date_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/khfTje3/wepux.pdfIn PDF document text
    • http://vijevejumozugim.sportsontheweb.net/hard_rock_guitar_licks.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496616/normal_601b4d0744726.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386834/normal_601c63c821199.pdfIn PDF document text
    • http://merotudonor.mypressonline.com/yongnuo_yn-560_iii_setup.pdfIn PDF document text
    • https://cdn.sqhk.co/tisewesir/hjgdhho/74968122581.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478387/normal_5fe79a6b94e9a.pdfIn PDF document text
    • http://jazulivorif.iblogger.org/calendario_liturgico_2018_argentina.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/xP5haCk/talking_kitty_dunjan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388041/normal_5fd2c0f41252b.pdfIn PDF document text
    • http://golixudib.mypressonline.com/53811559933.pdfIn PDF document text
    • https://cdn.sqhk.co/wesegagage/ghiajhn/uphill_rush_4_free_online_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedokow.rf.gd/zarizujobofafe.pdfIn PDF document text
    • https://f33d1b56-f518-462b-b61f-c1b5c1ba661c.filesusr.com/ugd/1c44ce_85411ee068824b83970654abea416ea2.pdf?index=trueIn PDF document text
    • http://terujak.epizy.com/48547265142.pdfIn PDF document text
    • http://losopokatefoxot.rf.gd/topabenipinef.pdfIn PDF document text
    • https://c2c662fa-00ac-4c69-bf5d-04da7d6c99e2.filesusr.com/ugd/9b33c5_caf3d067660746df9c230be28378644f.pdf?index=trueIn PDF document text
    • https://8bd0dbf5-62e0-4684-a95a-1d9666dfa34a.filesusr.com/ugd/e71694_f8ef8a31a3544d8080a6d387e658f386.pdf?index=trueIn PDF document text
    • http://butojoboxorak.epizy.com/watalobuxumazejogida.pdfIn PDF document text
    • https://4c72699b-aa2e-4dc8-8bd5-1a54e8f938a6.filesusr.com/ugd/f3cb45_29454ec78dbb450ea8de07e140dfe5e2.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED38 5436 bytes
SHA-256: 9e9375be15d69adb3de52f6645f78ed7617efe0ac8bf0ff180206a1cdd2fecbf

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