Malicious PDF — malware analysis report

Static analysis result for SHA-256 261705943731e9ec…

MALICIOUS

PDF

90.5 KB Created: 2021-03-17 08:04:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: f01ed9423a09f4cd27f02027f348ccde SHA-1: 997ae5b5c0b19e2a897d8b70ada904598aecde1b SHA-256: 261705943731e9ecebe1fb771bb9b4c58893af03df55fc906f827b8aa9560d8b
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting services and are part of a link farm, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to a malicious site via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=whirlpool+washing+machine+service+center+contact+number+philippines PDF link annotation
    • https://zufodivovogopot.weebly.com/uploads/1/3/1/3/131383523/sirawulijubofoz.pdfIn PDF document text
    • https://bituxomixa.weebly.com/uploads/1/3/4/1/134131270/03346ae9.pdfIn PDF document text
    • https://cdn.sqhk.co/pulizojiwim/dUjgihm/infection_control_certification.pdfIn PDF document text
    • https://waxebusesu.weebly.com/uploads/1/3/4/7/134770319/semafuduvusep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368972/normal_5ffc83c6cc71a.pdfIn PDF document text
    • https://cdn.sqhk.co/jitamoxi/gchhgcx/30539540857.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387808/normal_60336a346665d.pdfIn PDF document text
    • http://lami-lashes.site/jewels_legend_match_3_puzzle_apkwju1x.pdfIn PDF document text
    • http://prostosite.site/xesujixewugenenanavupikrpbw.pdfIn PDF document text
    • https://nopetozu.weebly.com/uploads/1/3/4/5/134507327/1344384.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445745/normal_5fcfb80e55ef3.pdfIn PDF document text
    • http://vipadminler.org/programma_gratuito_per_scrivere_su_in_italiano9yx4c.pdfIn PDF document text
    • http://electrumwallet.buzz/18261022513foi13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446790/normal_600a5327dcf07.pdfIn PDF document text
    • http://reduslimitalia.site/fitbit_versa_lite_watch_facesmys4s.pdfIn PDF document text
    • https://bepirujeli.weebly.com/uploads/1/3/1/8/131856565/7148090.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_3eaa74b275504fa2b7cb1b0fa535b1fa.pdf?index=trueIn PDF document text
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_0831355b1ebd47a8965b57ed48536af8.pdf?index=trueIn PDF document text
    • http://kuwixogup.rf.gd/65_bpsc_question_paper_2019.pdfIn PDF document text
    • http://xumugipetoje.epizy.com/sesopudafoxoluredaragew.pdfIn PDF document text
    • http://zemagarekerak.epizy.com/how_to_write_a_classroom_observation_essay.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E23 5652 bytes
SHA-256: 78d9d2c727ffa6024447a116adf7de20ff44862b6a637e2eb54ff124f6358470
font_01_sfnt_off00012149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12149 10840 bytes
SHA-256: 13016f52e17792aa7f4cba981a9c27771f77f24a1d51deaaf790438f6a0b1a69
font_02_sfnt_off0001464a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1464A 16148 bytes
SHA-256: dbe1f6873dfbc63a557840fa26764ed1e24daf10180a919a5f50e881975b6f06

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