Malicious PDF — malware analysis report

Static analysis result for SHA-256 f443f6387d9cd25c…

MALICIOUS

PDF

70.7 KB Created: 2021-04-01 21:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5292604ded864f3e1c96e3070e9af3ba SHA-1: 4b0e83bcce5500c353c501bb3b22f20421dcc40e SHA-256: f443f6387d9cd25c567ada9785ca4847309e515f953707383af79424abdf44d4
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with at least two pointing to potentially malicious domains ('botokaw.ru' and 'luwogexejel.getenjoyment.net'). The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting a phishing or spamming operation. No scripts were extracted, but the overall structure and URL findings point to a phishing or malware distribution attempt.

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://botokaw.ru/123?utm_term=bal+ganesh+hd+pics PDF link annotation
    • http://luwogexejel.getenjoyment.net/bulamuxilaxezowuroke.pdfIn PDF document text
    • https://nenomoxemobare.weebly.com/uploads/1/3/6/0/136010140/680a5d4f06f6b.pdfIn PDF document text
    • http://straponartist.com/mary_poppins_returns_trailer_castisg2r.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/418sBhf/mojegetifab.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/86027989151.pdfIn PDF document text
    • http://revodegasiger.sportsontheweb.net/nejekalajumuditupusu.pdfIn PDF document text
    • http://rujitexoxobag.mypressonline.com/piwurotunegoz.pdfIn PDF document text
    • https://kidamevu.weebly.com/uploads/1/3/1/4/131437276/fofap.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/9hj9iey/i_know_worship_song_lyrics.pdfIn PDF document text
    • http://kinorio5.xyz/micrologix_1000_cable_usb92sr1.pdfIn PDF document text
    • http://braco.ru/what_are_the_methods_of_teaching_mathematics_in_primary_schoolzvq7w.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/56233442086xjzke.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/nemafu/91232541244.pdfIn PDF document text
    • http://widifusi.myartsonline.com/captain_underpants_the_first_epic_movie_characters.pdfIn PDF document text
    • https://167c2301-eccc-4e3a-a609-38a4f17b9bf8.filesusr.com/ugd/b1dabf_bd45cf9c65854dd8b20adaaa12045d9b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/julawonokupoxawabudaviw.pdfIn PDF document text
    • https://71a0d42b-91d5-4e94-9338-ff69ca8a624b.filesusr.com/ugd/e5d5e5_d948b5450ecf479caa51ddc654b35864.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/priority_pass_form_amex.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/73552037633.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/geometry_equations_worksheet_tes.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_off0000d7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EA 5288 bytes
SHA-256: ec3cd684b452b26cfb937148407281c5f20e86cb249754d494c83ace4fbb2edc
font_01_sfnt_off0000e9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EE 10496 bytes
SHA-256: ff104befcf62641283ca140874b343fac6a29c77804264cc571a73a654a08c99

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