Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cb3e0d693f993b2…

MALICIOUS

PDF

77.9 KB Created: 2021-03-09 01:54:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 49f0c80e3990feb582983d856b2e1e64 SHA-1: 2d8d2e078debf01761c6fd82d915cc5343df9594 SHA-256: 6cb3e0d693f993b2e4eb28b024aa4f9b237fc4c41ff5338af7ec6534e87aefc3
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious and phishing-related. It contains numerous embedded URLs pointing to disposable hosting and link farms, suggesting an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/wix?keyword=x+factor+supplements+and+nutrition PDF link annotation
    • https://cdn.sqhk.co/xawodoze/Djdjft0/idle_air_control_valve_replacement_cost_uk.pdfIn PDF document text
    • http://wagijap.22web.org/good_brand_image_examples.pdfIn PDF document text
    • https://kefejuze.weebly.com/uploads/1/3/1/6/131606268/69b487204ff8a7.pdfIn PDF document text
    • https://diwopasod.weebly.com/uploads/1/3/4/4/134475510/mokixinam_tebuxugunukofu.pdfIn PDF document text
    • http://kogutojoveso.mywebcommunity.org/69611509941.pdfIn PDF document text
    • https://setixifofu.weebly.com/uploads/1/3/1/6/131606861/zogapunelad_gexep_nozivopiziwafe_xirowivifa.pdfIn PDF document text
    • http://wumomotetidofe.getenjoyment.net/cobra_360_laser_14_band_power_cord.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/Krigc56/66708695094.pdfIn PDF document text
    • https://cdn.sqhk.co/tixuniwe/jigdjd1/world_basketball_challenge_unblocked_hacked.pdfIn PDF document text
    • http://rijoginijamibeg.mypressonline.com/13778397075.pdfIn PDF document text
    • https://ludurodeb.weebly.com/uploads/1/3/4/8/134852143/ec71291.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/zalomi/elmo_world_song_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/loxivopafur.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/voxaromibepopawujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f95e002f-557b-450c-b6d4-d69b45e71a59/16846511034.pdfIn PDF document text
    • http://saridojuja.epizy.com/the_bell_jar_movie_release_date_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c93b47b-c83e-4557-ba1c-b05fea23fabf/grammar_land_game.pdfIn PDF document text
    • http://kevitokepe.epizy.com/dnd_5e_can_magic_crit.pdfIn PDF document text
    • http://darirafid.rf.gd/rinapexekazixi.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_off0000f40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40D 5276 bytes
SHA-256: 23e93cf44aa1cebe508ae8c47fcdce090c4d3dd72ee6db100f59e37d33dd56d9
font_01_sfnt_off000105eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EB 10916 bytes
SHA-256: 2b35bf11351b6971371568eae6fada4477872e1c4235972167480634cda42ec5

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