Malicious PDF — malware analysis report

Static analysis result for SHA-256 6db1f11650d61963…

MALICIOUS

PDF

79.3 KB Created: 2021-03-20 15:19:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ef00f9ee15296158e211144abf59edb8 SHA-1: b0a7c9c645d0806e024f9362e4b535f523944e2b SHA-256: 6db1f11650d6196351e8181e4de943977eaf2b23ff555e7a817e836c8fbfffbe
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 0.9995

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://leonvi.ru/strik?utm_term=romance+of+the+three+kingdoms+13+custom+portraits+download PDF link annotation
    • https://cdn.sqhk.co/mugegiduveb/j8icjaO/gibumipaxagix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456399/normal_5ff8dacdaba26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410222/normal_600a4f8067333.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383470/normal_600e059f8d768.pdfIn PDF document text
    • http://trynon.xyz/sawavesufvhe.pdfIn PDF document text
    • https://cdn.sqhk.co/sijaxovada/hdpcmgi/79909458043.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493221/normal_5fc7c28e409b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389824/normal_601b0cd3a2b4d.pdfIn PDF document text
    • https://cdn.sqhk.co/tokotuxajif/ehhKjcp/occupational_therapist_job_description.pdfIn PDF document text
    • http://jakartapro.xyz/pizzeria_delfina_deliveryizn95.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/Uja6oic/16947099393.pdfIn PDF document text
    • http://geesecam.com/40885087244v9mss.pdfIn PDF document text
    • https://cdn.sqhk.co/roratumopiv/dqAhfhi/nick_soccer_stars_2_crazy_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485703/normal_5fd074765d2be.pdfIn PDF document text
    • http://lnstagram-copyright-confirms.com/root_samsung_galaxy_note_10.1_gt-n8000_on_android_4.1.2equg8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370542/normal_5fed95514dca4.pdfIn PDF document text
    • http://unreguezff.rest/1789918058sf97k.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/tanapilamaxi/kohler_faucet_installation_guide.pdfIn PDF document text
    • http://dudufimapu.epizy.com/64941350472.pdfIn PDF document text
    • http://sosunakefimafo.rf.gd/777_qabalistic_writings_aleister_crowley.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/jasakevosuraxetafaw.pdfIn PDF document text
    • http://solonomufalak.rf.gd/comment_arreter_de_boire_de_l_alcool_naturellement.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_off0000dfb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB9 4048 bytes
SHA-256: d4eb4d0dc6d68d521f60e1503d063c5dbf7b976c52b9634787156bc1df6f3721
font_01_sfnt_off0000ee07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE07 5948 bytes
SHA-256: 3ffe225f4fcf357981e729dd9826034499c5beb747c7566d07f17c9804a35892
font_02_sfnt_off0001023e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023E 12772 bytes
SHA-256: 984104aacd9a1e2930f409aa49e0518f94ff7f97050bd85543c90ebe5d33515c

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