Malicious PDF — malware analysis report

Static analysis result for SHA-256 361d6dae09634ce2…

MALICIOUS

PDF

74.7 KB Created: 2021-02-21 22:55:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: d9f4b82ecc19ef125223ff65203fbb40 SHA-1: 7f3b4e7c6e90992b89c66f784999b95f45b7e9e8 SHA-256: 361d6dae09634ce275281ff845d3b74f9cc96f336958a62cdfd9a6867b4641ec
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are associated with link farms, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to trick users into visiting potentially harmful sites.

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://leonvi.ru/strik?utm_term=salary+in+indian+air+force+according+to+rank PDF link annotation
    • http://shortsomfj.space/total_conquest_hack_game_download57ftg.pdfIn PDF document text
    • https://sesanejaw.weebly.com/uploads/1/3/1/4/131407178/naziger.pdfIn PDF document text
    • http://gubokiwurajot.iblogger.org/mowesufoboges.pdfIn PDF document text
    • http://nufogikije.22web.org/mozilla_firefox_52_esr_for_mac.pdfIn PDF document text
    • https://zisetilu.weebly.com/uploads/1/3/1/3/131382786/6209a5eac8ca355.pdfIn PDF document text
    • http://bristol-yalta.run/run_3_flashmjdye.pdfIn PDF document text
    • http://wuvuzijime.22web.org/jofodamomujam.pdfIn PDF document text
    • http://ludozikime.22web.org/39022438029.pdfIn PDF document text
    • http://fofikotopavabe.iblogger.org/fuel_cell_technology_market_report_2017.pdfIn PDF document text
    • https://jajufuwupu.weebly.com/uploads/1/3/1/1/131163717/turegedipawugon-ruxoj-bonipojinoxaxim.pdfIn PDF document text
    • https://bixavovene.weebly.com/uploads/1/3/0/7/130775743/9052274.pdfIn PDF document text
    • http://dulexip.22web.org/55953450899.pdfIn PDF document text
    • http://najezeb.22web.org/employment_reference_letter_format_for_canada_immigration.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/ijeKLWs/zuwaxowomurusofex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mejuton.epizy.com/badli_badli_lage_song_wapwon.pdfIn PDF document text
    • http://zuwapiw.rf.gd/bulleya_sultan_movie_video_song.pdfIn PDF document text
    • http://xopemaw.rf.gd/dd_nails_hours.pdfIn PDF document text
    • http://nujafosedoke.epizy.com/35395110440.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_off0000e7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B5 5280 bytes
SHA-256: 2e36cae63dbb9fcd542b2e887351efc326c790159019c51d95b8ddd747bdd70d
font_01_sfnt_off0000f9c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C9 10560 bytes
SHA-256: b314a12eef978bc90732b68599919cb9a227eff1ed3342eaf284750e0407c70f

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