Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcfee7fa6c0df852…

MALICIOUS

PDF

83.6 KB Created: 2021-04-10 22:40:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 65895ffbb49fecabae0934805e446d46 SHA-1: ad0253ca73aa68aa2811d8fd489fb869b0c61750 SHA-256: dcfee7fa6c0df8527ad57660209e2ba6173ed820795c8ade89415508182a9018
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

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://fokemale.ru/strik?utm_term=how+to+clean+remington+shotgun PDF link annotation
    • http://closemaze.com/demon_slayer_kimetsu_no_yaiba_episode_45fwj9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377414/normal_5ff679386a0bf.pdfIn PDF document text
    • http://tigixupog.22web.org/dazawe.pdfIn PDF document text
    • http://nebo-baikala.ru/what_is_the_best_home_security_system_to_buyya5bv.pdfIn PDF document text
    • http://douchehq.xyz/how_to_clean_lint_out_of_bosch_dryerx1rvl.pdfIn PDF document text
    • https://babanude.weebly.com/uploads/1/3/4/0/134017813/jatatokofonek_fobatajimajuruw.pdfIn PDF document text
    • http://idealica-ordina.site/toro_ccr_2000_primer_bulbb5k7b.pdfIn PDF document text
    • http://fozujam.iblogger.org/vocabulary_food_and_drink_worksheet.pdfIn PDF document text
    • http://bupetud.xyz/sony_handycam_dcr-sx63eh2jl6.pdfIn PDF document text
    • http://pedrons.space/nespresso_usa_inc_aventura_fl2lkdz.pdfIn PDF document text
    • http://edalovert.xyz/70952569556icppk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381091/normal_60209527c3669.pdfIn PDF document text
    • http://keluzizizeroki.getenjoyment.net/61362090901.pdfIn PDF document text
    • http://pexarinolal.mypressonline.com/78503281968.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466398/normal_5fd7badf9a3f0.pdfIn PDF document text
    • https://zupevinar.weebly.com/uploads/1/3/0/7/130739631/wewolif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tagejenetel.rf.gd/emotional_freedom_technique_gary_craig.pdfIn PDF document text
    • http://luwefotikejumu.rf.gd/quimica_organica_inorganica.pdfIn PDF document text
    • http://pizuzol.onlinewebshop.net/osha_posters_required_construction_sites.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5E 5148 bytes
SHA-256: 1fa17f3d8115e27be0074abebc22310039a9cb9aac9ef0b413ad636732a401cd
font_01_sfnt_off00010fbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBC 10296 bytes
SHA-256: d558d80c63af3d574f2fcbbd1719f187b1292b494e6b2ba2085b4f237811b03b
font_02_sfnt_off0001330a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1330A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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