Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cff1e1cb0f7447a…

MALICIOUS

PDF

73.5 KB Created: 2021-03-23 21:12:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b221aa974bc15f8e695d143171ab62a4 SHA-1: a18cc26d1b4b2d246bb1601cf4e06ce9c9bb1970 SHA-256: 2cff1e1cb0f7447aef9c568585c9d38b6f7bd86069e0438d15da49aed3b236be
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. It contains multiple external URLs, including one pointing to 'botokaw.ru', which is likely used to redirect users to malicious content or phishing pages. The document body, though heavily obfuscated, suggests a lure related to streaming services, aligning with phishing tactics.

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://botokaw.ru/strik?utm_term=can%2527t+find+disney+plus+on+lg+smart+tv+australia PDF link annotation
    • http://linikewi.iblogger.org/85611070429.pdfIn PDF document text
    • https://cdn.sqhk.co/womawuxinuge/ujfqaje/1_image_4_words_level_39.pdfIn PDF document text
    • http://avtovishki-msk.ru/gunship_battle_helicopter_mod_apk_latest_versionrpwzb.pdfIn PDF document text
    • http://setopin.mypressonline.com/what_does_coronary_artery_stenosis_mean.pdfIn PDF document text
    • https://cdn.sqhk.co/zabeluzitema/hc0gj66/4_clues_word_search_game_answers_level_4.pdfIn PDF document text
    • http://xilexevu.scienceontheweb.net/33451949524.pdfIn PDF document text
    • http://train-home.ru/xaxajebnkug8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xawezukazekexi.epizy.com/cet_admit_card_2019_link.pdfIn PDF document text
    • http://fowimifefezujo.myartsonline.com/neviluludegobevima.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/todawovekubefalad.pdfIn PDF document text
    • http://boboxivelo.epizy.com/bobsweep_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/farokof/nudirugaxeba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d250ef92-0715-46b1-ab60-87c442a045b4/how_to_connect_novation_launchkey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa4bbf31-3143-4d23-a279-ce0c65eb2595/ronaguv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/469dba25-77b6-471c-b74b-41454c7dc129/what_name_means_god_will_provide.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_off0000e1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F2 5460 bytes
SHA-256: 0645c0b051ab9b74194efcee1bffd04d562d85a8ca76139dad5392d33624946e
font_01_sfnt_off0000f489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF489 10688 bytes
SHA-256: 0474c839273331b821d8ffc3ff5a8b2579a5c28b3e4aa9cfd68dc1f311bc8685

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