Malicious PDF — malware analysis report

Static analysis result for SHA-256 d347c58450702ff6…

MALICIOUS

PDF

76.9 KB Created: 2021-03-25 12:29:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5efb6a998515fad141f7de64e722c9e6 SHA-1: c006925339730f0a543b4d3bbd5fe5e1a1b14fc3 SHA-256: d347c58450702ff6792a6b14224861687c579d335214d1ac6157c96979d7472a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/123?utm_term=gears+of+war+4+achievement+guide PDF link annotation
    • http://faxusupovetek.sportsontheweb.net/2870963332.pdfIn PDF document text
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/8060074.pdfIn PDF document text
    • http://wikuseweluwi.iblogger.org/arris_modem_tm822g_manual.pdfIn PDF document text
    • https://kanemonel.weebly.com/uploads/1/3/5/3/135319287/pefuwobavev.pdfIn PDF document text
    • https://cdn.sqhk.co/mojubemuwek/hgNjhge/dragon_quest_8_hero_skills.pdfIn PDF document text
    • http://sekujirimabasas.getenjoyment.net/medical_certificate_for_school.pdfIn PDF document text
    • https://juvezunadu.weebly.com/uploads/1/3/5/3/135306862/giredowesi.pdfIn PDF document text
    • https://zevebijupaxize.weebly.com/uploads/1/3/4/7/134754497/julunuxinu_wemiwezuxesux.pdfIn PDF document text
    • https://cdn.sqhk.co/kototokim/cggjhhc/japanese_alphabet_song_hiragana.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/igg0ghb/80s_music_love_songs_youtube.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mufomasugom.epizy.com/how_does_public_policy_impact_entrepreneurs.pdfIn PDF document text
    • http://neluwomarar.epizy.com/laminated_door_design_catalogue.pdfIn PDF document text
    • http://ranuvukeguzekiz.epizy.com/history_of_anglican_church_in_ghana.pdfIn PDF document text
    • http://lesasesodimavun.epizy.com/88151422458.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d62bf2ae-97fb-41e0-b5b1-960996ff2bc6/83689393553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/844dda78-b57e-437a-bd9a-94d5193d665f/disney_cast_member_discount_halloween_party.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4468237-2efe-4b90-a6b8-948a8ea8dceb/how_much_the_salary_of_aircraft_maintenance.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE71 5676 bytes
SHA-256: f23482443a06b5d9bac6a6a44b8acb49aa0273700058efe190f344f9b11f3bb3
font_01_sfnt_off000101ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BA 10840 bytes
SHA-256: bcfad791c48491414b50164eac4f7825fc1f2699fa88b21a9ddd448912c92f4c