Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdb0af80783967e6…

MALICIOUS

PDF

78.8 KB Created: 2021-04-15 09:02:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6434501a0b287629a654b72b86a688a7 SHA-1: 70f01faf728e511b57101568ebda904b83b264e0 SHA-256: bdb0af80783967e60ac60bed64ff5535460cf4a0f52169a1a338186d07895694
186 Risk Score

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-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://botokaw.ru/strik?utm_term=sword+art+online+progressive+volume+2+pdf PDF link annotation
    • https://cdn.sqhk.co/suxunuke/ifIjhBE/ludovico_einaudi_sheet_music_experience.pdfIn PDF document text
    • https://cdn.sqhk.co/gobefuvumi/iUu8cMY/55779608863.pdfIn PDF document text
    • https://cdn.sqhk.co/xovatagemi/jehdZU3/police_report_crime_uk.pdfIn PDF document text
    • https://dasezakam.weebly.com/uploads/1/3/4/8/134883145/dagazobexefa.pdfIn PDF document text
    • http://votexetoke.iblogger.org/vefurusuj.pdfIn PDF document text
    • https://tenekitu.weebly.com/uploads/1/3/4/0/134018212/jajeba.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/hfVgcge/tie_dye_sweatshirt_girls.pdfIn PDF document text
    • https://zitenimed.weebly.com/uploads/1/3/1/3/131383388/3044834.pdfIn PDF document text
    • https://cdn.sqhk.co/sunawopi/qihgggc/aws_iot_architecture_ppt.pdfIn PDF document text
    • https://cdn.sqhk.co/resozasevej/jUzggKW/hill_climb_racing_2_best_car_to_upgrade.pdfIn PDF document text
    • https://cdn.sqhk.co/buxifuludo/tURNieY/6734739996.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/7d4fc716-1aa4-46da-9c05-406adbb023af/avaya_one_x_communicator_not_opening.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de911644-5855-4df7-9af7-af647c912553/how_to_program_linear_garage_door_to_car.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47793275-e23a-40ff-8ce7-b9f1f6a10d32/lusiweludamupalup.pdfIn PDF document text
    • http://labukifured.epizy.com/vodumesebasive.pdfIn PDF document text
    • https://849cba27-c1c2-4801-a47f-514a08c45c3c.filesusr.com/ugd/7f7a2c_bd2506268209472da55a254d748e1c2f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b038d2f-2fa8-4775-b32f-dc81bae19bf8/baxewuxuzezugozupuwov.pdfIn PDF document text
    • https://b147a2f3-58af-4013-9def-597e86e94513.filesusr.com/ugd/47d6bb_b45278d6caa6451ca6f339fe166d96c7.pdf?index=trueIn PDF document text
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_7e6eff199eba4f23b14fee36fa0920a2.pdf?index=trueIn PDF document text
    • http://tisikifapov.rf.gd/bawibategovurowoxigole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65faa38c-e54f-4ec0-9c97-f79066010b0d/12802743829.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_off0000f5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FE 5748 bytes
SHA-256: 8e7b32c276116ce3abf84c4927d2c204684e63372dd7ab93af93b4d0f1d43073
font_01_sfnt_off00010995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10995 10392 bytes
SHA-256: 9d6353db7757d910f5332b7cdc9ca67ee59db8587347b09af59bcd69fbe00663