Malicious PDF — malware analysis report

Static analysis result for SHA-256 c165acd1986975fe…

MALICIOUS

PDF

77.8 KB Created: 2021-03-11 12:32:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 7374e29de43f0050147305157c48fdb4 SHA-1: 2d4675378335df7ef3e1fd886d4aeae033d448d1 SHA-256: c165acd1986975fea31b15840c127dbf6e0895e2fa454bc2d6a4d1ba20b42f14
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 0.9996

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/award?keyword=libros+para+aprender+coreano+pdf PDF link annotation
    • http://xumupizaxuto.scienceontheweb.net/40413816290.pdfIn PDF document text
    • http://linavaluviriv.getenjoyment.net/another_word_for_visual_learning.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463264/normal_6021cd6775abd.pdfIn PDF document text
    • https://nurosizakudagag.weebly.com/uploads/1/3/4/6/134699554/2851161.pdfIn PDF document text
    • http://pigigozoruda.mypressonline.com/mitib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381962/normal_5ff1070f585b9.pdfIn PDF document text
    • https://tedarotola.weebly.com/uploads/1/3/1/4/131482933/56079ddcf5.pdfIn PDF document text
    • http://jopagozopive.medianewsonline.com/78561527647.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://folujas.epizy.com/hotmail_app_for_mobile.pdfIn PDF document text
    • http://bobujosu.epizy.com/vadexubuku.pdfIn PDF document text
    • http://latuwukatagowa.epizy.com/basic_life_support_provider_manual_answers.pdfIn PDF document text
    • http://rimalapotozuf.epizy.com/arabic_model_english_fonts_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d2aac27-b481-431d-bb9e-2314d9467849/club_car_precedent_seats.pdfIn PDF document text
    • https://4e33067b-0f13-4bed-bb9c-ea95f768fd7c.filesusr.com/ugd/23924c_241f01575e2546df90c112acf3fa3521.pdf?index=trueIn PDF document text
    • http://darozux.epizy.com/23840911506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78aee0a2-e286-41fb-831b-b6dbb31eccd1/what_is_ethics_in_sport_management_research.pdfIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_2807b556d3e74eb0aab196f38541093f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/40c73b44-094d-411c-8270-b3c56b2e262f/nafaviruronemesipalisureb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0909af5c-f6f2-4a9c-b65c-64893ab25006/somawopalinofebusodux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64399302-9f72-46e4-ae04-1e4930c31335/bisujejunipufunokebo.pdfIn PDF document text
    • https://cfae799c-d04a-4395-b2c2-700dffd2ed5c.filesusr.com/ugd/15504a_e5793783e6224ceca7466671c9fbf84e.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
    • 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_off0000dd38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD38 5200 bytes
SHA-256: 9f8ec769bc6b45721296aa4902ff190503d37671a88bbdd461b0a69c60a6ca2b
font_01_sfnt_off0000eef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF1 11084 bytes
SHA-256: 3164ffc9415c48d81734621d6610d096908081528a4c3d19c1ffad15fdbb9d35
font_02_sfnt_off00011332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11332 16108 bytes
SHA-256: 97e80cc61ebbc6fe4ed03ffd5a5ae1d184ef07adb4204580ef84f3eb02720edc

Open this report in the interactive analyzer, or submit your own file for analysis.