Malicious PDF — malware analysis report

Static analysis result for SHA-256 29249b16b68957bf…

MALICIOUS

PDF

75.7 KB Created: 2021-03-19 23:42:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3702437ea435fa8cf418ec583dffb7fb SHA-1: 1ea2d19b7c1a2f61ce836d21297b3e6b289935ab SHA-256: 29249b16b68957bf8a65faa9bd39ab0cda2122eba39d5d723d2ddd1ed2981659
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9996

Heuristics 6

  • 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 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://crophysi.ru/strik?utm_term=watch+princess+bride+online+free+streaming PDF link annotation
    • https://cdn.sqhk.co/popuzanuguw/g1evkre/bupodota.pdfIn PDF document text
    • https://vigagexagadip.weebly.com/uploads/1/3/1/8/131856194/banilawa.pdfIn PDF document text
    • https://fupodakabapamom.weebly.com/uploads/1/3/4/4/134489617/lakefobe-xivubijurejis-tixemasepap.pdfIn PDF document text
    • https://mipikarekegimo.weebly.com/uploads/1/3/1/6/131606279/4497505.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/general_anesthesia_for_cesarean_section.pdfIn PDF document text
    • http://bewizasosu.sportsontheweb.net/77222506758.pdfIn PDF document text
    • https://cdn.sqhk.co/pezolaje/dhhPhh8/17435062584.pdfIn PDF document text
    • http://zumanidoxup.medianewsonline.com/47531751448.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/ansys_apdl_commands.pdfIn PDF document text
    • https://wazolupagod.weebly.com/uploads/1/3/0/7/130775763/jujuzidagelato.pdfIn PDF document text
    • https://xugimitedekilim.weebly.com/uploads/1/3/1/4/131482884/tepojewudexulavijetu.pdfIn PDF document text
    • https://dolivosogokate.weebly.com/uploads/1/3/0/8/130874088/4057728.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/7z7jdhi/am_i_eligible_for_verizon_service.pdfIn PDF document text
    • https://cdn.sqhk.co/rodesedaded/AS5hbVC/5485565607.pdfIn PDF document text
    • https://mafenipo.weebly.com/uploads/1/3/4/8/134879688/xamevaget.pdfIn PDF document text
    • http://bivaxosufuxibo.mygamesonline.org/mercruiser_5.0_oil_capacity.pdfIn PDF document text
    • https://famosufed.weebly.com/uploads/1/3/4/9/134900490/liwosabe-lemabuwubosa.pdfIn PDF document text
    • https://mewatejo.weebly.com/uploads/1/3/5/3/135322937/9515826.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/da4c359e-5e60-448e-9f0a-5ba303e87b5b/kubota_bx25_backhoe_bucket_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/929a078b-f45f-4e92-96ac-4acd2efbe2a4/juego_de_tronos_cancion_de_hielo_y_fuego_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c78d8b7-c83b-41ba-8b7e-6df0fa9f0bf6/32924054189.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_off0000e859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE859 5724 bytes
SHA-256: c0bbf1047bcc3fd5ec73c32f21da8cd7c81640b799da1957d741c37115e3e1aa
font_01_sfnt_off0000fbad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAD 10968 bytes
SHA-256: 4a7325287c6b08c8c83b2a089c93401abfcb02c0f32f7c9afa9336b41004da56

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