Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba377e830de47213…

MALICIOUS

PDF

79.2 KB Created: 2021-06-10 09:24:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7265c5d9c9f948ea875eaeae42a50b0f SHA-1: cfcddcfc5ffb75d8228b1b5bd313706bb8407ae6 SHA-256: ba377e830de47213d59c9667c5f55e2af57f0b4fc2ffcad74861ca619089e57e
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, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://inwebjor.ru/pbw?utm_term=savage+x+fenty+bra+size+guide PDF link annotation
    • https://manoduxasef.weebly.com/uploads/1/3/4/0/134041035/a0f64b7.pdfIn PDF document text
    • https://lavigumujow.weebly.com/uploads/1/3/4/4/134438710/ripibujugumijenas.pdfIn PDF document text
    • https://lufowatevumidoj.weebly.com/uploads/1/3/4/7/134704320/ruwamas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369763/normal_6057c6bf2b298.pdfIn PDF document text
    • https://lajejajutabi.weebly.com/uploads/1/3/6/0/136050508/758cad0b0871e.pdfIn PDF document text
    • https://nawowelefet.weebly.com/uploads/1/3/4/4/134498780/xarapiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410703/normal_5ff1d727418df.pdfIn PDF document text
    • https://wovogivas.weebly.com/uploads/1/3/4/0/134012667/tonopirojoxej-vozojajesizuje-gonedegofebugir-sugiluvu.pdfIn PDF document text
    • https://kakewexetoza.weebly.com/uploads/1/3/4/6/134693891/donolatizapubad-fubozizofagedod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475375/normal_600fdd62e5de4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373985/normal_606873bbb893d.pdfIn PDF document text
    • https://nunesevafarub.weebly.com/uploads/1/3/0/8/130874378/xenetilifa-navinati.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407306/normal_5ff1115ce2f9c.pdfIn PDF document text
    • https://nubipudovolena.weebly.com/uploads/1/3/4/0/134012318/af4ddf5eb13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374835/normal_6060827cdaee0.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/8646882.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416930/normal_6035e1984ca18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405197/normal_5fcceec23a25d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446380/normal_5fd3d7a6de2b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447101/normal_6050e147b7fd6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481527/normal_60037a056b62d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wixugigir.pbworks.com/w/file/fetch/144573264/how_do_you_know_someone_blocked_you_on_discord.pdfIn PDF document text
    • http://nefusim.pbworks.com/w/file/fetch/144815013/70277954861.pdfIn PDF document text
    • http://zizojeza.pbworks.com/f/ds_emulator_ios_download__500____Low__4.pdfIn PDF document text
    • http://gutupum.pbworks.com/f/3112220196.pdfIn PDF document text
    • http://lifelekufa.pbworks.com/w/file/fetch/145018566/avengers_in_chronological_order.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_off0000f589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF589 5564 bytes
SHA-256: 5c47e2e583f70f57f2fc4f2760ff968ab355cba5a5dd7248347994633835acc8
font_01_sfnt_off000108a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A7 11204 bytes
SHA-256: 6da60325d096cc94a44cd62f8cf5c2353c6c9b97ccb6f8483fca5d9f20776c14