Malicious PDF — malware analysis report

Static analysis result for SHA-256 f39dac10a915e4b9…

MALICIOUS

PDF

77.3 KB Created: 2021-05-09 03:27:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6d700db04f34d08476c676293b0e520c SHA-1: 3eecd039ef2d5ea70d080445fcd5c61880bc408e SHA-256: f39dac10a915e4b95e149fec1decb7480a9a63dcb17b87a83eab022c7a0ea844
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, with a prominent one pointing to 'fokemale.ru', suggesting a redirection to a malicious site. The document body, though heavily obfuscated, appears to be a lure related to search results, aiming to trick users into clicking the embedded malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://fokemale.ru/strik?utm_term=vintage+sears+kenmore+sewing+machine+cabinet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417998/normal_6008c0d9b5017.pdfIn PDF document text
    • http://faxixovojaja.sportsontheweb.net/50718815468.pdfIn PDF document text
    • http://futiwakeso.22web.org/is_there_a_reset_button_on_hitachi_tv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455886/normal_6045ff34ad4dc.pdfIn PDF document text
    • http://japamawosoj.mygamesonline.org/33007419805.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/libro_los_compas_y_el_diamantito_legendario_descargar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448115/normal_6040f730c55ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500447/normal_606c2d258b59a.pdfIn PDF document text
    • http://gixipures.sportsontheweb.net/mosbys_drug_guide_for_nursing_students_11th_edition_free.pdfIn PDF document text
    • http://lopixerirerenex.mywebcommunity.org/39489358389.pdfIn PDF document text
    • http://nopuvobetag.mygamesonline.org/law_of_agency_in_zimbabwe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vimevuda.rf.gd/chromedriver_file_java.pdfIn PDF document text
    • https://d3826037-6016-486c-99e9-dc41bc666644.filesusr.com/ugd/b81754_08b9db692ce14ece98b8cd12ab56c65a.pdf?index=trueIn PDF document text
    • http://gozulejawefufap.epizy.com/23094039243.pdfIn PDF document text
    • http://zanipufikikuk.rf.gd/53432918658.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/85182969208.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/tor_browser_android_app.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/what_classifies_a_hamlet.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/ipcc_assessment_report_5.pdfIn PDF document text
    • http://pimobepetokonud.myartsonline.com/business_plan_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/m-audio_keystation_88_mkii_manual.pdfIn PDF document text
    • http://xizuzaziz.rf.gd/poxakavito.pdfIn PDF document text
    • http://binuwuzipu.myartsonline.com/kerala_psc_bulletin_2020.pdfIn PDF document text
    • https://e06e8306-d71e-4c92-aa1b-e8c52eeb44cb.filesusr.com/ugd/bc4951_b3f5354473584152a1492638d8301acc.pdf?index=trueIn 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_off0000ef44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF44 5444 bytes
SHA-256: 36fcb29b7556c0e205836b3566d4196dc928a878ffb64118a96736667d2e09fe
font_01_sfnt_off000101bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BC 10572 bytes
SHA-256: 364c1a07cd14dd1b9b74e6bdf5fa9c6cea4e61364b25a92a79a0cf4b4f918bdb

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