Malicious PDF — malware analysis report

Static analysis result for SHA-256 de0c6dc9d477a355…

MALICIOUS

PDF

78.6 KB Created: 2021-03-22 20:53:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 69a2e2c9623e5fd864d4d7325fc54562 SHA-1: 8e9b321822e735999d037dddd247cbc3d9ffaf67 SHA-256: de0c6dc9d477a355c452aaf34d2db18bc32ce489b412d21c3c4a96a4ea301509
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The primary malicious URL, 'https://fokemale.ru/strik?utm_term=digital+marketing+coordinator+salary+entry-level', is identified as a phishing lure, likely attempting to trick users into believing they are viewing job search results. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://fokemale.ru/strik?utm_term=digital+marketing+coordinator+salary+entry-level PDF link annotation
    • https://bujovuve.weebly.com/uploads/1/3/0/7/130738596/rarifefuzalazikasen.pdfIn PDF document text
    • http://investmag.org/fugijitigigilunulosafomavqay8.pdfIn PDF document text
    • https://banafazag.weebly.com/uploads/1/3/4/3/134325205/4337008.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485445/normal_6005883d48e5f.pdfIn PDF document text
    • http://istra-backwater.ru/103927885419b6s2.pdfIn PDF document text
    • http://prequester.online/lodger_agreement_template_scotlandjc9m4.pdfIn PDF document text
    • http://sopafekidis.sportsontheweb.net/59951169450.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449406/normal_600818674d0ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379970/normal_6024fc80a0321.pdfIn PDF document text
    • http://milanbeach.fun/2003_ford_focus_zx5_batteryxdu4d.pdfIn PDF document text
    • https://povurumupun.weebly.com/uploads/1/3/4/8/134884194/vajagopukorasum.pdfIn PDF document text
    • http://distornyup.site/rulizenotejowejabewamuturpavn.pdfIn PDF document text
    • https://zuvexege.weebly.com/uploads/1/3/0/8/130814851/3125399.pdfIn PDF document text
    • http://new-volosi.ru/girixajixidokoxokodomerixeo41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417519/normal_6011045148a33.pdfIn PDF document text
    • http://ilook.market/zadekz7ehi.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/tinajabizoreguf/90482853103.pdfIn PDF document text
    • http://sodowurivav.onlinewebshop.net/what_happens_to_an_objects_kinetic_energy_as_speed_increases.pdfIn PDF document text
    • http://gozidonozali.myartsonline.com/brassica_juncea_medicinal_uses.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/28588175536.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/pictionary_cards_with_pictures.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_off0000f343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF343 5516 bytes
SHA-256: efd2dc953448b9f3ec82fe079a569facdd3703e59dfe81ece0a1c2a48840c965
font_01_sfnt_off0001060a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060A 11452 bytes
SHA-256: 8fbab13b8f4f47027904e68380a51653dcb69b35d565ab06c6ab411d4647e700

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