Malicious PDF — malware analysis report

Static analysis result for SHA-256 1109afd17f2b3093…

MALICIOUS

PDF

86.0 KB Created: 2021-05-29 19:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4bb5b937c4e44f78d4f617ecb812318b SHA-1: aa85d8a27a6892e4438f6f5964b3a57edfca2209 SHA-256: 1109afd17f2b309373c9cac0a443b3ff71ef7d00e9919ec1360083203b466fb2
156 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 0.9992

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 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.
  • 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://vilenefex.ru/strik?utm_term=how+to+setup+garmin+echomap+uhd+93sv PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453329/normal_606e755cbceec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_6014501d70379.pdfIn PDF document text
    • https://bejejedagaf.weebly.com/uploads/1/3/4/8/134862385/xalimofomonanibu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384471/normal_5fdc4d6b78a2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501356/normal_602841150219c.pdfIn PDF document text
    • https://romidemifavev.weebly.com/uploads/1/3/1/8/131857114/zulegove-kenanetamomewix-nusivadeniba-gikupimeguw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426830/normal_5fec42c620c63.pdfIn PDF document text
    • https://maxolesaso.weebly.com/uploads/1/3/0/7/130776327/7426608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407807/normal_60248788da976.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383170/normal_6044f38d48509.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459057/normal_6013190b473ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379387/normal_5ff1fcc80de54.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/734e0b8e-2a08-4a7b-8a3f-d33c27ceeafc/what_is_the_electron-pair_geometry_for_i_in_ibr3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5614c9db-c5a3-4496-a86d-fe7a0e4f9ff3/essential_chemistry_for_cambridge_igcse_student_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba54957f-410e-4c09-9511-edfa77071c20/how_to_adjust_a_stationary_bike_seat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eea4073-4162-494e-aab9-04e07ec845fe/riladalugodajifegumeda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83fb964e-f81a-4348-b637-5b9390470bf4/lexexawisovuzamozolosukav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07619e51-54a6-49d1-89c6-b44853bdd33d/samsung_c460_installation_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13603c5d-3d8c-42b6-9ef7-7c74851a59dc/ucsd_undergraduate_research_scholarships.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fb6152b-9595-4002-a3ad-a702ec647197/26084441107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76ef9073-6d31-4952-bce4-9f27a510565d/ps_vita_tv_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ab56fe5-6b22-4540-8f83-4a4fb9b44847/perumodudidaxuzisevujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c11588d-c530-405c-aff8-06943f0b7c1b/amc_8_2009_solutions.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_off00010cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDF 5888 bytes
SHA-256: 9eb5d57fa3df7358079160585ba3b30d436dfc6d8f6b970730785629ddd367f5
font_01_sfnt_off000120da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120DA 11748 bytes
SHA-256: 93a5955f1ceb07b2363a94f25f78d392b0f1d06a8cbc760e43ea127ab8f5ecc7

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