Malicious PDF — malware analysis report

Static analysis result for SHA-256 854f9088874a0106…

MALICIOUS

PDF

78.8 KB Created: 2021-03-20 08:28:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0d1828c6e41e70c201cd4d7b43e66643 SHA-1: e81c2fc14988d6fd790cb4006dbe343488d50513 SHA-256: 854f9088874a0106f1e2e9f8f69d3758dd230eb1d324a1fbaa3d71548c4f35bd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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://pelibifir.ru/strik?utm_term=war+and+peace+movie+1966+audrey+hepburn PDF link annotation
    • https://bawokuxuduxiv.weebly.com/uploads/1/3/1/8/131856062/buxut_jemizuvexamom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405650/normal_6042ec20a531a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419836/normal_5ff7784f37996.pdfIn PDF document text
    • https://tikedamo.weebly.com/uploads/1/3/1/4/131453682/kelolubibago.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457298/normal_5fe15f9b0c7cb.pdfIn PDF document text
    • http://porizaritofo.mypressonline.com/anemia_ferropenica_en_adolescentes_embarazadas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446394/normal_604472e7d793f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489414/normal_601d3681a40cf.pdfIn PDF document text
    • http://help-bluebadgecustomer.com/vuvizabisurogizovarev5wu6z.pdfIn PDF document text
    • http://leree6.club/bright_minds_memory_rescue_music_cdhxc5j.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/39162293039.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/unitypoint_urgent_care_altoona_hours.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/pufunopopovigewojevun.pdfIn PDF document text
    • https://pikulevixabokof.weebly.com/uploads/1/3/1/6/131606248/7250704.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417029/normal_60401f0e8deac.pdfIn PDF document text
    • http://tulavesew.getenjoyment.net/taming_of_the_shrew_act_2_scene_1.pdfIn PDF document text
    • http://netewe9.xyz/1627443881823fb5.pdfIn PDF document text
    • https://lexijodipegi.weebly.com/uploads/1/3/4/5/134510521/wubazit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485149/normal_60526f87d140a.pdfIn PDF document text
    • http://dsv-trening.ru/angle_of_elevation_and_depression_worksheet_3zjvy9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7b76904-2018-4e17-b5b9-68f674c19d0f/guess_the_brand_answers_level_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb5faf19-c120-4e59-850a-cfe111b8c159/ordinal_data_psychology_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/852e567d-927e-4346-9fdc-4c5dbf3cf0c4/what_is_an_example_of_realism_in_the_red_badge_of_courage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21cc4d08-8fac-436a-b90c-95009dbcad43/facebook_software_engineer_machine_learning_interview_questions.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_off0000f2a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A3 5780 bytes
SHA-256: b85be66272cb2f183a49b43c0347019dc256505859cda5e8dc7a4ea1a109dd5a
font_01_sfnt_off00010640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10640 10924 bytes
SHA-256: a9b9915eb701e8a4d2e0b07f5bdee24f33e891b405fe05f1333b6e502e24949f

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