Malicious PDF — malware analysis report

Static analysis result for SHA-256 7981c3c384a75c0f…

MALICIOUS

PDF

71.7 KB Created: 2021-03-24 07:43:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: a799b544b5e873bd672264309b959267 SHA-1: 1b3de64647055f73a2c88816ade04ce253a6d009 SHA-256: 7981c3c384a75c0f9aa7cc8cded85b8a4231c2d341389b77bd9057385a39693a
126 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, and is described as a link farm for 'unblocked games'. The primary malicious activity appears to be directing users to external, potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/wix?keyword=unblocked+games+24h+superfighters PDF link annotation
    • https://cdn.sqhk.co/wixexozesila/VJbsRhc/tikixawuzil.pdfIn PDF document text
    • https://cdn.sqhk.co/gapalagabig/iiHw9q7/express_exchange_money_transfer.pdfIn PDF document text
    • https://cdn.sqhk.co/jenetuwuda/WthddFc/gatubevomizonebaj.pdfIn PDF document text
    • http://xejeboge.22web.org/tdsskiller._exe_bleeping_computer.pdfIn PDF document text
    • https://bururinuriz.weebly.com/uploads/1/3/4/8/134882015/vanotesono.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxogafu/agcjeja/metallica_sanitarium_live_2017.pdfIn PDF document text
    • https://jeduwisuduxib.weebly.com/uploads/1/3/1/4/131483356/276417.pdfIn PDF document text
    • https://labufixurugon.weebly.com/uploads/1/3/4/8/134873424/nemidelaxinejag_betejibokedomuk_sejutarasudun_bikodasupavo.pdfIn PDF document text
    • https://vizavidonase.weebly.com/uploads/1/3/4/0/134040461/derapipigepexu_pufusabo.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/Vjifuam/ice_age_adventures_mod.pdfIn PDF document text
    • https://gimituwemowi.weebly.com/uploads/1/3/4/8/134872285/vokijeteredubuv-getutidipi-pilupebasawif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dalava/kipuritize.pdfIn PDF document text
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_c4750fd764d044eea7ed5e2afe8d7513.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/92897992946.pdfIn PDF document text
    • http://fatebem.epizy.com/vmware_vsphere_interview_questions_and_answers.pdfIn PDF document text
    • https://73099f28-10d5-4558-98a1-2f8dc61f1a2f.filesusr.com/ugd/f62eaa_f71ab86394ab47288679c05bde386ec3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nabifovu/cerebro_en_la_cubeta.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/beat_maker_go_mod_apk.pdfIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_f89c3300adad40fcae9c984c5dddab28.pdf?index=trueIn PDF document text
    • http://gumajixu.rf.gd/find_path_of_assets_folder_android.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD80 5868 bytes
SHA-256: c2929191b154a5c9a5733c58a6cf807f233ee1fe77c521b47f9cb4fb8be39a8b
font_01_sfnt_off0000e14a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14A 10064 bytes
SHA-256: f929b149034eb506ad5c696a164a6ab69d4f0f8534e2ed0cb17ca74637de203f
font_02_sfnt_off0001036c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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