Malicious PDF — malware analysis report

Static analysis result for SHA-256 44bea74f0b87312a…

MALICIOUS

PDF

78.3 KB Created: 2021-06-12 02:40:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6e8817b6e8f81a36dfaff445efe6aacd SHA-1: 3ed5d0cdbbd549dd9086f04a645b327b0dfd1019 SHA-256: 44bea74f0b87312a9ffd5d1b875943bf517fa66ed980c99a200e85922be4d9cc
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to leverage web content for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/123?utm_term=annual+goalkeepers+report PDF link annotation
    • https://zosesudemosovar.weebly.com/uploads/1/3/4/8/134865665/bugizefavuzewix.pdfIn PDF document text
    • https://nopovufarake.weebly.com/uploads/1/3/1/3/131379277/95a554b460412c7.pdfIn PDF document text
    • https://nixodogal.weebly.com/uploads/1/3/0/7/130739919/jogesew-kosinisogenusuv-luvidemenat.pdfIn PDF document text
    • https://lopuradusat.weebly.com/uploads/1/3/5/2/135297354/4343787.pdfIn PDF document text
    • https://tupadutuxoti.weebly.com/uploads/1/3/5/9/135974222/5578046.pdfIn PDF document text
    • https://delazodudiz.weebly.com/uploads/1/3/4/5/134591817/5032623.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fagimox.pbworks.com/w/file/fetch/144752205/levenuwif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3b01627-e2fa-4260-97ae-166dc7e96ce2/suzuki_quadrunner_250_brakes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b19eda4a-1262-4360-9b67-8132e0df9ae0/putogeneropuliramitejavuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64cb9377-3a28-4c98-9137-408861875a17/mastering_the_grade_8_social_studies_teks_answer_key_chapter_10.pdfIn PDF document text
    • http://mupalunava.pbworks.com/w/file/fetch/145067034/watch_inuyasha_dub.pdfIn PDF document text
    • http://lewomirat.pbworks.com/w/file/fetch/144866424/ms_dhoni_full_movie_hd_download_in_tamilrockers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8a9b9b7-ddaa-45ce-b63b-a93bb815dfdd/68941910350.pdfIn PDF document text
    • http://lalunanefiw.pbworks.com/f/jane_anjane_mein_web_series_all_episodes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e43a049-0f3f-4796-826b-36df05d0a1ef/sibiriretovaxorufavek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a01932d1-afe4-4524-ae5b-f9516715d5f0/53871964757.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_off0000f66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66F 5040 bytes
SHA-256: 03115a82dd6f57ed1e88b68b06445daeb9de8ce83563911dc861dc0571419f29
font_01_sfnt_off000107a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A9 10828 bytes
SHA-256: 5f01b3a0b48af79c978d73a7552d16c3d73941b61f5a0096b5cb895ecd9e9226

Open this report in the interactive analyzer, or submit your own file for analysis.