Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ff6efb35873a9c…

MALICIOUS

PDF

76.4 KB Created: 2021-04-06 00:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: b9b9918db77a1f6c5aef67b576c23039 SHA-1: 567ac4f59cd724c3ff53db2290e569c382f6bdc1 SHA-256: 32ff6efb35873a9cd26008a3677800bd443bf3569062419d06fa4217c9774017
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spamming operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to direct users to phishing or malware-hosting sites. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/wix?keyword=england+vs+new+zealand+live+streaming+on+ten+sports PDF link annotation
    • https://cdn.sqhk.co/nesunarimu/ifNwQjb/toy_story_alien_smash_cake.pdfIn PDF document text
    • https://vapulorefemefiz.weebly.com/uploads/1/3/5/9/135956910/9852127.pdfIn PDF document text
    • https://cdn.sqhk.co/kisilusotuke/9hhsgfH/hillsdale_college_football_camps_2020.pdfIn PDF document text
    • http://funewiwawako.iblogger.org/48758803035.pdfIn PDF document text
    • https://cdn.sqhk.co/rekutadis/hdqjdig/download_2048_number_puzzle_game.pdfIn PDF document text
    • https://zusikoxapumobib.weebly.com/uploads/1/3/4/7/134766975/folakowu_xadedulikanor_lejozez_rosemorajizami.pdfIn PDF document text
    • https://cdn.sqhk.co/rowemarul/lZNwTjh/snow_bowling_mini_game_botw.pdfIn PDF document text
    • https://lonaxixa.weebly.com/uploads/1/3/1/4/131413275/4564722.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/hgeicQS/nintendo_switch_console_deals_walmart.pdfIn PDF document text
    • http://jopekeniwuvino.iblogger.org/zojaparot.pdfIn PDF document text
    • http://zotolowowomeve.iblogger.org/function_of_psychiatric_social_work.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gejijudufer.epizy.com/feelings_and_emotions_vocabulary_exercises.pdfIn PDF document text
    • http://vagilamiporaw.epizy.com/25556379496.pdfIn PDF document text
    • http://betatugagiv.epizy.com/how_to_find_limits_to_infinity_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/78518956672.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/75413108236.pdfIn PDF document text
    • http://vedalutepex.rf.gd/72162111235.pdfIn PDF document text
    • http://gibilumopujilot.epizy.com/wuzebipewekojutuzenajab.pdfIn PDF document text
    • http://xofaxisenulomav.epizy.com/gibezewadov.pdfIn PDF document text
    • http://zuzimadatunukag.rf.gd/76649888303.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/carols_of_the_bells_satb.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/11674720043.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_off0000eb81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB81 5436 bytes
SHA-256: ec0b59f24eb18b8220c36b581a3ea16b60dcf90211f2d65d306b744b6ee0d88d
font_01_sfnt_off0000fe08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE08 11104 bytes
SHA-256: ee475798d49d94f94f16aa3c69a3eb71ea56b37faed39d55137c614a327be291

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