Malicious PDF — malware analysis report

Static analysis result for SHA-256 a724ad0d47201b26…

MALICIOUS

PDF

78.5 KB Created: 2021-03-28 21:29:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4d9dd199561551caf2094540961a9ca6 SHA-1: cf4f960cbf3126074617d4e1e357cc1abb749a5e SHA-256: a724ad0d47201b2692f41c6614fbf503c8e2af59e46373c996e3266610030574
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The document body, though heavily obfuscated, contains keywords related to project management, likely serving as a lure.

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/award?keyword=waterfall+model+in+project+management+pdf PDF link annotation
    • https://cdn.sqhk.co/veletafi/jimhonp/blackpink_ice_cream_flavor.pdfIn PDF document text
    • http://shop-profildoors.ru/monster_2003_watch_onlinewewnm.pdfIn PDF document text
    • http://reestr.site/3735819320msrz9.pdfIn PDF document text
    • http://xitnet.fun/arapa_soy_aac_rnekleri10st2.pdfIn PDF document text
    • http://confirmationhelpcenter.com/sugufuzedi7ya.pdfIn PDF document text
    • https://cdn.sqhk.co/bijininabex/lQjeJjh/31694213335.pdfIn PDF document text
    • http://cmb-accueil.com/fapozezuxixesemuv7jesa.pdfIn PDF document text
    • http://fitokapss.xyz/white_space_is_not_your_enemy_2017_free_download9ciwm.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/1334c3e7-5bad-4752-9013-b504d124357e/11145108028.pdfIn PDF document text
    • http://wumujofagitamix.rf.gd/asus_xonar_dx_pci-express_x1_7.1_channel_sound_card.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abbd6282-c2bc-40d1-a3b6-18f38c6aaf65/what_is_a_landscape_social_studies_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ab04a01-35db-480f-9aa0-6b57547d3216/thomas_calculus_9th_edition_solution_manual_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91b50a98-2080-47a8-b724-67388cc0658e/doro_7050tl_flip_easy-to-use_cell_phone_for_seniors_white_by_tracfone.pdfIn PDF document text
    • http://budunasetixap.epizy.com/javigu.pdfIn PDF document text
    • http://xidujexakarola.rf.gd/73216538796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5506a489-1c75-466a-87b2-13b7d56e1589/dc_train_schedule_metro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b723d2dd-a008-4b7a-9a0b-a5eca34d91c7/senior_cloud_engineer_salary_canada.pdfIn PDF document text
    • http://fusuxitizubuka.epizy.com/risimubudubobe.pdfIn PDF document text
    • http://vamuxusonepuf.rf.gd/19593326256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0f9bcca-6214-482a-b217-ad55d2839986/alpha_urdu_word_meaning.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_off0000f4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BC 5388 bytes
SHA-256: c27f3da2a7f672f7384ee65385a59155a58f49134af2601d99ed38f65b26e739
font_01_sfnt_off0001070e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070E 11160 bytes
SHA-256: f7dd378ae14312f351387684ce05d69fe815753416bda7e7a4d24cf7ac42a2e3

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