Malicious PDF — malware analysis report

Static analysis result for SHA-256 a75fadb18d8c8958…

MALICIOUS

PDF

89.4 KB Created: 2021-05-11 10:12:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 78bb07800b9147985310e12f9da47bb3 SHA-1: 987fbfbf25a2272dc3a60024e75854432f191121 SHA-256: a75fadb18d8c8958845f806c81bfba73d5a3dc8440d36405720e565b76a55e5f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://soxebez.ru/strik?utm_term=pathfinder+first+world+realm+of+the+fey+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451225/normal_601c878c582a1.pdfIn PDF document text
    • http://xoroketogejuxe.mywebcommunity.org/cochlear_implant_manufacturers_fda_approved.pdfIn PDF document text
    • http://mukinumatonewo.getenjoyment.net/57913594464.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454807/normal_60561fa6ed03e.pdfIn PDF document text
    • http://pawezujexas.mywebcommunity.org/why_is_my_dish_remote_not_working.pdfIn PDF document text
    • http://sufulilutidake.mypressonline.com/62540738404.pdfIn PDF document text
    • http://womizepivilora.sportsontheweb.net/69345306406.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/vedic_astrology_star_sign_dates.pdfIn PDF document text
    • http://vepenuvix.mygamesonline.org/79333374180.pdfIn PDF document text
    • http://rivokalodusi.sportsontheweb.net/platform_based_business_model.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/midizaxopazeji/doxasuzalobel.pdfIn PDF document text
    • http://rabelame.atwebpages.com/xonavurefetat.pdfIn PDF document text
    • http://wekazuvenasiwuf.epizy.com/tevogasimirotijipuzer.pdfIn PDF document text
    • http://vajapojaperusu.myartsonline.com/kugibib.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/bhu_bsc_biology_2018_answer_key.pdfIn PDF document text
    • http://sivojosifa.epizy.com/antioxidant_activity_plant_extracts.pdfIn PDF document text
    • http://vomovawesojuti.epizy.com/like_water_for_chocolate_summary_chapter_11.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/simple_past_tense_form_of_have.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/what_oil_to_use_for_diesel_generator.pdfIn PDF document text
    • http://pimobepetokonud.myartsonline.com/pubozinemaji.pdfIn PDF document text
    • http://tojuzogip.myartsonline.com/add_watermark_to_adobe_acrobat_reader_dc.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/24559063512.pdfIn PDF document text
    • http://tejozusob.rf.gd/al_quran_terjemah_indonesia.pdfIn PDF document text
    • http://romakilax.myartsonline.com/capuana_profumo.pdfIn PDF document text
    • http://xovijoj.epizy.com/xavaxas.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_off00011f1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F1C 5476 bytes
SHA-256: 55cbb2a8e1d7b180e5a1e920b6d20cf0a6dbcd53423bdd54ab70484cf346dc8a
font_01_sfnt_off000131ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131AB 11368 bytes
SHA-256: df8f9aeaaa41a2dca5817e8db353ceb2a36cccf216be56db11d48f591fe1bccd

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