Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b241cb270361a5c…

MALICIOUS

PDF

78.4 KB Created: 2021-03-30 22:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e5d3fafafbf77f391cf3766ec586abe7 SHA-1: 8f82faea68bf15de79fa32ecf25838f91c11fd6f SHA-256: 4b241cb270361a5caad682d568f2d85494eb27df823b42b4e4c0e17f47951fa7
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 0.9993

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://bologen.ru/strik?utm_term=why+is+my+doro+phone+not+charging PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385228/normal_601a066850431.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/arlette_farge_le_got_de_l_archive.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/dr_brown_microwave_steriliser_dimensions.pdfIn PDF document text
    • http://piwulag.sportsontheweb.net/zobagajok.pdfIn PDF document text
    • https://cdn.sqhk.co/zimidenex/glYifgr/alto_s_adventure_unlock_characters.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424997/normal_5ffaa2f448e90.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458623/normal_600775d6ef728.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409997/normal_603c06369aed6.pdfIn PDF document text
    • http://pewujok.mypressonline.com/87069547771.pdfIn PDF document text
    • https://cdn.sqhk.co/toledexipez/YhahfwO/84844107379.pdfIn PDF document text
    • http://letaraluzim.scienceontheweb.net/55985624292.pdfIn PDF document text
    • https://cdn.sqhk.co/gulaxemetila/eQUFieO/blue_lips_artwork.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505358/normal_6031ae1132628.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a183692e-8207-40e5-8530-fb8b46d6b4b0/theories_of_interpersonal_communication_ppt.pdfIn PDF document text
    • http://milebulijulami.onlinewebshop.net/how_long_does_it_take_for_prevailing_wage_determination_2020.pdfIn PDF document text
    • http://lawesiwewif.onlinewebshop.net/carrie_stephen_king_book_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/89431888095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ddaaa44-af0d-4320-98ee-5af7218638a6/laxabevupegiwuzefilalu.pdfIn PDF document text
    • http://limoxukuk.atwebpages.com/tipos_de_amenazas_que_se_analizan_en_un_plan_de_emergencia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14cf95c1-295d-45bc-8ac1-7d7d2c784a9e/how_to_watch_star_wars_in_chronological_order_on_disney_plus.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/rugalefedozere.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/squarespace_tutorial_template.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/2003_jeep_liberty_limited_edition_price.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_off0000f2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D5 5572 bytes
SHA-256: f68c3dc6c84dac941eedff811672d02a019b44efa4137b909a257b050393657a
font_01_sfnt_off000105ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AC 11472 bytes
SHA-256: 055fe8bdfecc4f999794486265b2e953bebea9960fa8f47c518e8788f3b3bab9

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