Malicious PDF — malware analysis report

Static analysis result for SHA-256 6772ea3496b9465e…

MALICIOUS

PDF

88.7 KB Created: 2021-05-02 15:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 230fd3e249ecc5ff6b4270c6f7874dba SHA-1: b84b853d1aaf602c6ce13aea442c177ae8df4bb6 SHA-256: 6772ea3496b9465ed21d0b4a59acd8d31b56a20d1c8aba179ab0e2178aa4e5ef
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-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://resalured.ru/strik?utm_term=maya+banks+kgi+series+book+12 PDF link annotation
    • https://cdn.sqhk.co/wuxaguzifep/eWOhc8g/12690516536.pdfIn PDF document text
    • http://wutulesarox.iblogger.org/mobil_1_engine_oil_guide.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/gym_workout_plan_for_beginners_female.pdfIn PDF document text
    • http://xajabuzowa.scienceontheweb.net/intermittent_fasting_diet_meal_plan.pdfIn PDF document text
    • http://lamenizabov.22web.org/pojuf.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/kondisi_pendidikan_di_indonesia_saat_ini.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419828/normal_603ebb3368491.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493195/normal_5fdb361ecf325.pdfIn PDF document text
    • https://cdn.sqhk.co/zumumolebajo/gcggcWT/best_offline_world_map_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445742/normal_600adfd501de5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481170/normal_600da7880eeec.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/d8cc4acc-17e9-4866-80b8-019c374f55e1/96523552089.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee8e068d-6f02-40bf-acd3-c3d153cdcd58/mathematical_statistics_with_applications_7th_ed._wackerly_mendenhall_and_scheaffer_duxbury.pdfIn PDF document text
    • http://rimugerumu.rf.gd/korean_face_sheet_mask_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/929a5a15-7292-4079-b322-a6c6f544ca71/bose_wave_radio_cd_player_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fa1a9d7-db07-43c7-b039-e9c266ae602a/is_50_straight_push_ups_good.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aefac8aa-18d6-4258-8600-72400db8354f/why_is_my_acer_monitor_not_turning_on.pdfIn PDF document text
    • http://lazoxiro.onlinewebshop.net/28278530700.pdfIn PDF document text
    • http://lonopisok.epizy.com/jakaxelojiwivobikuvenefi.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
    • 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_off0000ff9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9E 5316 bytes
SHA-256: f4fbc370b1c1e4175181e1d29b1f8a94ef9c89559d9311f8897863a63ad576a3
font_01_sfnt_off000111e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E0 14436 bytes
SHA-256: f39a2985b3e2ce2de7db7728f875f623b61261fa651abe35de5b81514524314a
font_02_sfnt_off00013eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EAE 16132 bytes
SHA-256: e14397e2b17bbbd32a5318d63a06f5ea006919a235bd94b66e30b8753aba1162

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