Malicious PDF — malware analysis report

Static analysis result for SHA-256 83eb12c1ddde5bf0…

MALICIOUS

PDF

77.5 KB Created: 2021-05-01 13:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5c97f693a39a14d7af12ab363bbe75bf SHA-1: caab2ee80eaf693ab35fa30e2a310a80da79c1e3 SHA-256: 83eb12c1ddde5bf08aab9eb069c05f4ebdf0cf9eabeda3e43b02543654a94140
186 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external links, many hosted on disposable domains, suggesting a phishing or SEO manipulation tactic. The primary lure appears to be related to 'how to trade the forex market the easy way', directing users to a collection of 30 other PDF files. While no scripts were extracted, the PDF structure and embedded URLs strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/strik?utm_term=how+to+trade+the+forex+market+the+easy+way PDF link annotation
    • https://lajogaful.weebly.com/uploads/1/3/4/4/134481829/sonobilomazo_tusoruruvik.pdfIn PDF document text
    • https://cdn.sqhk.co/vitikitema/vJgdFZR/android_fragment_databinding_viewmodel.pdfIn PDF document text
    • https://cdn.sqhk.co/bemovunilupo/ifcdFrx/samsung_level_u_user_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/hhbhbrk/37652976862.pdfIn PDF document text
    • http://moxegagiku.22web.org/fosejitupikidapizapofeja.pdfIn PDF document text
    • http://pevazaw.mypressonline.com/13647726868.pdfIn PDF document text
    • https://vevikonupefafo.weebly.com/uploads/1/3/5/3/135391347/2699419.pdfIn PDF document text
    • https://pitidupokeni.weebly.com/uploads/1/3/4/4/134485339/86f707d26bd7a74.pdfIn PDF document text
    • https://kofiwesufe.weebly.com/uploads/1/3/4/7/134748014/vogipojuwifu-ledixawikejufo-tukezupotex-kumazop.pdfIn PDF document text
    • http://bikokobolo.sportsontheweb.net/grief_and_loss_cycle.pdfIn PDF document text
    • https://gazodajatara.weebly.com/uploads/1/3/2/7/132712558/1a608cc896f.pdfIn PDF document text
    • https://cdn.sqhk.co/makubeku/ijaFgh8/void_pyramid_walkthrough.pdfIn PDF document text
    • https://vewefididijos.weebly.com/uploads/1/3/4/5/134517371/tijenigosidewijavuv.pdfIn PDF document text
    • https://sedogosep.weebly.com/uploads/1/3/4/4/134486754/sonuv.pdfIn PDF document text
    • https://vefutafefu.weebly.com/uploads/1/3/4/8/134882527/fusesi_lakanu_fipanex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rapuxatidugek.epizy.com/lamination_sheets_colours_in_pakistan.pdfIn PDF document text
    • https://2daccc73-8708-4113-a26a-4f38906335d9.filesusr.com/ugd/f65175_953ad21a3b87421ebd2f9f6aad9a23cf.pdf?index=trueIn PDF document text
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_65038a1f09e7456abd301293aa90fa7f.pdf?index=trueIn PDF document text
    • http://mowovojedux.epizy.com/benijitesakigevir.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_off0000f111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF111 5400 bytes
SHA-256: cd225f863c56794477c6f27e29f24add929606601872ab0686d83065ea262c32
font_01_sfnt_off0001035d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035D 10968 bytes
SHA-256: 1d4d7726525a82c1ceb2f820aadfc4b63822de990e93d4d88c26ff31754ea5d8

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