Malicious PDF — malware analysis report

Static analysis result for SHA-256 8774c9c6de54edd2…

MALICIOUS

PDF

78.0 KB Created: 2021-04-24 05:16:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 59f3abfc631f4723246657493262686d SHA-1: 15a3baa280c8f6ec3227105241462db6d8e58bf0 SHA-256: 8774c9c6de54edd286c7c4a11dde23494e0b3faf23d032e0ad3911f1147d7121
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://botokaw.ru/strik?utm_term=towers+of+midnight+epub+download PDF link annotation
    • http://gojavodevagajuw.mygamesonline.org/55683254544.pdfIn PDF document text
    • http://rivepozepuxar.mywebcommunity.org/18251738579.pdfIn PDF document text
    • https://cdn.sqhk.co/nizivatitogu/oHQ9Sgj/download_game_drag_battle_racing_mod_unlimited_money.pdfIn PDF document text
    • http://oneitstore.pro/ages_and_stages_12_months_scoring3428t.pdfIn PDF document text
    • http://esparks.ru/all_water_breathing_forms_demon_slayerttbzx.pdfIn PDF document text
    • http://tehnoprom.org/assistant_teacher_exam_2018_answer_key1wi6n.pdfIn PDF document text
    • https://cdn.sqhk.co/gokitoser/K6lNhjq/94923304206.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/qjdjajf/refuzeda.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/jjYzB5S/39089730730.pdfIn PDF document text
    • http://logmeinnow.xyz/89299780351qiagh.pdfIn PDF document text
    • http://robadepid.iblogger.org/13288495091.pdfIn PDF document text
    • https://cdn.sqhk.co/rigepasemapa/VVhthfq/computer_system_ppt_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://musovulazapa.epizy.com/xizenamoneladovufulo.pdfIn PDF document text
    • http://rodisasedozax.myartsonline.com/business_english_course_content.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/671aa10b-7887-4032-bad5-46e0d08f751e/64314928569.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/86659062045.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/29911178419.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/luigi_s_mansion_3_gem_guide_b2f.pdfIn PDF document text
    • http://xisuwujilaxemer.myartsonline.com/91200629296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7f645b6-6110-49a3-bb47-81c811907074/fitonefevedogenudewulote.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/baduto.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF047 5636 bytes
SHA-256: 95556508c12d44d2159c8d5489421d721f0caa26e6c2fef087d8712f66273a65
font_01_sfnt_off00010352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10352 10940 bytes
SHA-256: 43affb103c5fdc633334cac4066a952f6d64c89140140f62461cf88a2c1cc8e8

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