Malicious PDF — malware analysis report

Static analysis result for SHA-256 324c687583157454…

MALICIOUS

PDF

81.9 KB Created: 2021-04-30 01:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9b020cf0e4af9a5d30a5a6d92d03b49f SHA-1: 83f9340bc3ec3fb50ebf452c003e1e9022da93ce SHA-256: 324c687583157454da04156098af0467195d11ee010406098eb7c8cbb403e070
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://jacksth.ru/strik?utm_term=what+does+it+mean+to+be+a+child+of+god+in+the+bible PDF link annotation
    • http://pinixubezanamot.iblogger.org/38220347251.pdfIn PDF document text
    • https://vanizubifimid.weebly.com/uploads/1/3/0/8/130874516/4654616.pdfIn PDF document text
    • http://vazewuxu.mywebcommunity.org/definicion_de_aprendizaje_social.pdfIn PDF document text
    • http://nakezubelakibe.22web.org/caldera_baxi_manual_de_instrucciones.pdfIn PDF document text
    • http://kimokabif.medianewsonline.com/ideological_state_apparatus.pdfIn PDF document text
    • https://sulomotosepotu.weebly.com/uploads/1/3/4/7/134744650/2fc9f67474.pdfIn PDF document text
    • http://zimefob.22web.org/life_after_life_raymond_moody_in_urdu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/punurum/34898056.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/peg_perego_john_deere_tractor_6v_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d95d6668-48b6-42cf-9013-36f539a1925b/explain_the_two_routes_to_persuasion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4be97091-25eb-4b09-b6fd-7f5547acccf6/barifovuzakidid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e809f69-c419-4f5a-bc03-909177f5dc11/kujokufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a89544b-f310-4f83-a9dd-6135d4860864/ap_english_literature_and_composition_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/3855607778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6ac54f7-c1e0-416a-8730-ea324b08646e/35513275169.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c61839e-4ee8-436f-ad52-88786f98a9b7/cal_health_safety_code_11351.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/children_s_books_about_guide_dogs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d67056a3-64e9-48a9-b410-d389f147c7e7/76752891658.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7baf0a01-4e23-4bba-84fb-cd3604e65391/18254009814.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/xebuwawogapawez.pdfIn PDF document text
    • http://disozisujenat.epizy.com/we_apologize_for_the_inconvenience_hitchhikers_guide.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_off000102b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B6 5492 bytes
SHA-256: f9f7b513f0b6086f26863507b9549f6e4f5d93288f4a6b0842705515c46e3b77
font_01_sfnt_off00011555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11555 10748 bytes
SHA-256: 1b7bcb4a9b34256e9c4529f11d9d9f931be5c9fdcaf3cd4a8b456d837b6b2e1b