Malicious PDF — malware analysis report

Static analysis result for SHA-256 713e9c09a93a9476…

MALICIOUS

PDF

79.7 KB Created: 2021-04-02 00:22:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 82752b93a29f3ee0a0b2220a4fd17a70 SHA-1: 528ee429da3e0bc0d029f95a48ac53f8f95ffbc9 SHA-256: 713e9c09a93a94765ceed54908d298d3a63892607311b4dfeed36bae6312696f
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 0.9998

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://ponafet.ru/aws?utm_term=mole+concept+questions+for+jee+pdf PDF link annotation
    • http://wopexobow.mywebcommunity.org/best_shocks_for_stampede_4x4_vxl.pdfIn PDF document text
    • http://juvozukatug.66ghz.com/ziludolide.pdfIn PDF document text
    • http://electrumwallet.buzz/7629165342k8som.pdfIn PDF document text
    • http://gomigapujasep.sportsontheweb.net/recherche_des_agglutinines_irrgulires.pdfIn PDF document text
    • http://odemebayisitrafik.com/negifefefekixoromovjoxid.pdfIn PDF document text
    • http://qrettalq.online/positive_mental_strength_quotestry0r.pdfIn PDF document text
    • http://wawewifebobojum.22web.org/lateral_epicondylitis_physiotherapy.pdfIn PDF document text
    • http://fuvufurewuf.iblogger.org/changing_active_to_passive_voice_exercises_with_answers.pdfIn PDF document text
    • http://mixutadumekaje.mypressonline.com/how_to_find_radical_in_math.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://murajop.epizy.com/47942042792.pdfIn PDF document text
    • https://9d3edb37-11ce-4d87-b861-4f8d850d55a0.filesusr.com/ugd/0d2aa0_84c99630d65a4cb19fe12fad1ab930fa.pdf?index=trueIn PDF document text
    • http://wopaxigaromuf.epizy.com/infographic_template_resume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0eb3a82-22fb-4a7c-b705-467457ba6093/8291036336.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fca6534a-cb16-417b-9487-9496d3677d32/lifukasolidajezopi.pdfIn PDF document text
    • https://10bc5e17-7652-4c7e-9b43-999b3eb3b021.filesusr.com/ugd/5edc69_25f5267166ec47e7a5885750d6519be1.pdf?index=trueIn PDF document text
    • http://kimekidagi.rf.gd/lilavobodevulavixu.pdfIn PDF document text
    • http://posowisame.epizy.com/51202386953.pdfIn PDF document text
    • https://ee42ee57-4547-4a8c-8a66-6cccb7f6869d.filesusr.com/ugd/2a9ad2_9a8eaf7081064ebda0439add19955da4.pdf?index=trueIn PDF document text
    • https://5e54d98c-4257-4cc7-9010-48f3df296eb2.filesusr.com/ugd/05240c_1ceda211f1e34805af57da6b47be6d8e.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE3 1708 bytes
SHA-256: ea3c11c55893d29cadf94120c9934de44505257653f30a2dd30b0e7f7ca97502
font_01_sfnt_off0000f754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF754 5144 bytes
SHA-256: 0bc51c509a9900ff52be9e1db69e207ba7cc7c7968ab29108cea9db2ea27f3d0
font_02_sfnt_off000108f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F7 11904 bytes
SHA-256: 7b0433318a2b27258a1707fc01ec1d811303f9648a275cec63b7ce6800591483

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