Malicious PDF — malware analysis report

Static analysis result for SHA-256 75bfdbc3052c9f09…

MALICIOUS

PDF

99.9 KB Created: 2021-03-04 01:45:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ea51b2cf4028dbef1cdcd54043ba4f92 SHA-1: 83b2c598b45fc7d41bd1d33b1c38194cf786ff3c SHA-256: 75bfdbc3052c9f097fc6f94081fc920ce168ba921ec7d6a83e22091b0063784d
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains a title that appears to be a lure, and the presence of many external URIs further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/strik?utm_term=did+ariel+die+in+the+original+little+mermaid PDF link annotation
    • https://cdn.sqhk.co/lopijikuvi/jfie9LY/gym_weight_loss_success_stories.pdfIn PDF document text
    • https://risimapi.weebly.com/uploads/1/3/4/3/134321435/a3658f.pdfIn PDF document text
    • http://dusefibesix.iblogger.org/guralogavanazo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495391/normal_5fec53a06de9c.pdfIn PDF document text
    • https://cdn.sqhk.co/gunakawujo/fgiignT/tower_heroes_casual_mode.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/hc1juMw/recette_sandwich_baguette_steak_hache.pdfIn PDF document text
    • https://totidulabi.weebly.com/uploads/1/3/1/6/131606487/40c8b55b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495241/normal_6002b7d8ba2e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445119/normal_6015a204b3921.pdfIn PDF document text
    • https://warejavusa.weebly.com/uploads/1/3/4/0/134017768/5032816.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443326/normal_5ffe883454fc9.pdfIn PDF document text
    • https://dokegofixak.weebly.com/uploads/1/3/0/8/130873830/abdbb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vakewexapenox.epizy.com/bbc_weather_report_chennai_today_and_tomorrow.pdfIn PDF document text
    • http://wakafovoda.epizy.com/givilepaz.pdfIn PDF document text
    • http://bifapekedareb.rf.gd/algorithms_and_flowcharts_in_programming.pdfIn PDF document text
    • http://selofedibaxonal.epizy.com/bed_sheet_online_shopping_cash_on_delivery.pdfIn PDF document text
    • http://nakepusigazu.epizy.com/codycross_answers_group_37_puzzle_4.pdfIn PDF document text
    • http://zepogofeto.epizy.com/livobulodimupeluwemuwegiz.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_off00014ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CE4 5060 bytes
SHA-256: c548040722c5a6a91ff30fd03f8bdc2757b534cdff9325726bd863850ae63467
font_01_sfnt_off00015df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DF0 10544 bytes
SHA-256: 19f35130586cefcd51fc15ac72ae9765dd8ef0a27aa9fbe36d46a2af887da749

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