Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea564a759718cfe5…

MALICIOUS

PDF

80.3 KB Created: 2021-04-10 02:02:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: cdcb51b4e11341c4e213a1e8835156b1 SHA-1: 2a7469131240f2bbacd7e6a62f419dda44dc23a7 SHA-256: ea564a759718cfe5cd838a9adbe0be7e4b0b2f36de099ae19f2fa0ea529a9478
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous external URLs pointing to various domains, many of which are hosted on disposable or potentially malicious infrastructure. The primary purpose appears to be directing users to external content, possibly for SEO manipulation or to serve as a distribution point for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 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.
  • 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://nipisod.ru/strik?utm_term=what+color+are+michigan+tabs+for+2020 PDF link annotation
    • https://zofumevovuve.weebly.com/uploads/1/3/0/8/130874077/fd3b1bc75481f.pdfIn PDF document text
    • https://palejuzuz.weebly.com/uploads/1/3/5/9/135959315/3828963.pdfIn PDF document text
    • https://cdn.sqhk.co/muwizavo/hfhjy6u/contract_killer_1_mod_apk_offline.pdfIn PDF document text
    • https://punujagenak.weebly.com/uploads/1/3/0/7/130775029/639827.pdfIn PDF document text
    • https://cdn.sqhk.co/jufemipikuke/giBchjw/agario_money_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/dovinokobez/vgjhhZ4/wamikep.pdfIn PDF document text
    • https://cdn.sqhk.co/tinodifozeza/htHxidn/gufosefiv.pdfIn PDF document text
    • https://cdn.sqhk.co/mibupufek/fWOXfkN/oscar_health_plan_of_california_provider_phone_number.pdfIn PDF document text
    • http://gerajite.iblogger.org/atul_gawande_el_efecto_checklist.pdfIn PDF document text
    • https://dipediras.weebly.com/uploads/1/3/0/7/130739778/nugukusun.pdfIn PDF document text
    • https://lenagabonozizaj.weebly.com/uploads/1/3/4/3/134314127/fonixowaropoxerilat.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/Ahw8hfW/ibaco_ice_cream_cake_shop_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/wudarivat/g2mVbgj/triblive_best_of_the_best_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/JgiLrgc/fruit_master_game_app_download.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://673fcb93-492a-40d1-a7cc-77260b5c7816.filesusr.com/ugd/62d21a_fd3c6c95f9e04a02afd50afea962037d.pdf?index=trueIn PDF document text
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_a4ef9db591e84654875fd54dc89b7240.pdf?index=trueIn PDF document text
    • https://4868a29a-6d77-448d-a9c5-bc5c6a1713c3.filesusr.com/ugd/060e50_cd3568f8439b44b0a7eb286d669962fb.pdf?index=trueIn PDF document text
    • http://fegugeg.rf.gd/accessible_information_standard_care_homes.pdfIn PDF document text
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_6d8da817dd9f40ac8d90e3d4377ca560.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0ffc47d-871b-42af-af11-78ca36027ccf/how_to_tell_bible_stories_to_adults.pdfIn PDF document text
    • http://kipamorilezux.epizy.com/29455338210.pdfIn PDF document text
    • http://gegekekesi.epizy.com/simple_english_grammar_tenses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6526ba9a-7e02-4365-a76c-f2eb0ecf012e/heat_n_glo_fireplace_repair_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f28c1a7-ce70-46e3-96f3-c66df467d52c/75764468730.pdfIn PDF document text
    • https://02664c88-84e5-42fa-aae3-682d3a0d4328.filesusr.com/ugd/39d081_c5f1542e239e47dc9a203957b74d589f.pdf?index=trueIn 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_off0000eb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4F 5512 bytes
SHA-256: 7942b688e23f2335a5f0594cd4d3cc7e141ffc34803f939ede7d3ee34b280d14
font_01_sfnt_off0000fdec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEC 11584 bytes
SHA-256: 632074fa49c2d2b4c1d4d4052b1612b9ecf46fbfd6f9935f9be09ff5b99bbf7d
font_02_sfnt_off0001257a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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