Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fdc7dd39aa33e0f…

MALICIOUS

PDF

124.5 KB Created: 2021-03-17 00:12:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b9774f07cb9119638ba1e4b41428a3ac SHA-1: bd92810abef4e46e948a09f88ceadcb67519b647 SHA-256: 4fdc7dd39aa33e0fa8b5238a17e017d3a0d76dd99d3670bfe219fc0b6a5f48d7
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable domains and flagged as link farms. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains references to 'casino games apk', suggesting a lure for potentially unwanted or malicious software. The presence of external URIs and link farm heuristics points towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 4

  • 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://jumiwimov.ru/123?utm_term=casino+games++apk PDF link annotation
    • http://tiwujatujoput.mygamesonline.org/the_crown_season_3_episode_7_church.pdfIn PDF document text
    • http://xitawefavam.medianewsonline.com/telecharger_certificat_de_cession_de_vhicule.pdfIn PDF document text
    • http://linefesejewug.sportsontheweb.net/calendario_juliano_2020.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/wufebasalenokituwakone.pdfIn PDF document text
    • http://kafujaguvo.mygamesonline.org/bakaruvudemijofu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380858/normal_6004f701e7eb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444369/normal_6021629d797ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413712/normal_5ff5f229dcf0c.pdfIn PDF document text
    • http://rulabepotinujeb.mypressonline.com/momavu.pdfIn PDF document text
    • http://zixivudu.getenjoyment.net/el_sistema_endocrino_esta_formado.pdfIn PDF document text
    • http://www.opentle.orgIn 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/9b26a1e6-4135-46c9-a45a-6dfbb796807a/element_elefw328_hdmi_cec.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/640a6f79-75dd-4df3-b9e4-f2105a3deb2e/9324463563.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e945c0d2-361c-487f-87bf-1d9526ae0a27/jaxum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3cac805-a9aa-438b-9043-99b6486a4c0a/tozexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31eba6e9-4d60-4c9f-bfb6-a81debd90496/jaxilowevakas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c63f1e32-ac1c-4919-b4df-a05c551a2ba1/silexikubawikodegixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9715268f-0f9d-489e-9d02-703061e214d0/gipirokexejatina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa31d64b-05d5-4a28-b0d0-97ff869e23f7/philips_portable_dvd_player_swivel_screen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8707d46-afdc-411d-b3e7-ff60757ac29f/learn_to_draw_comics_the_marvel_way.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://www.gnu.org/licenses/gpl.htmlIn 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
    • http://scripts.sil.orgIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000160f6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x160F6 11900 bytes
SHA-256: e8f742f702d55988625d6ab76dba1681f30dbfca29ba885549efd892b8752861
font_00_sfnt_off0000f3ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AB 30268 bytes
SHA-256: ba4797f0f994feb21f54d6104e8a7740fd497c05d63a0556e4b34401bd13bb03
font_01_sfnt_off00015018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15018 4980 bytes
SHA-256: 2fdfe499ebb382a15a981f79df4f4a5ab718c5d7cec6b2fa5e8c202dc101cb0c
font_03_sfnt_off00018278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18278 1832 bytes
SHA-256: 54315f2459ceef18a61755f48e9497a56ec331bf6a26c33d6b24b2588840f147
font_04_sfnt_off00018b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B79 16956 bytes
SHA-256: 065a9f993d1db8f9bd75e1ae7d663f736693f9becf568849dbd74ba3d33e8928
font_05_sfnt_off0001b80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B80D 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2
font_06_sfnt_off0001cd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD0E 6492 bytes
SHA-256: 3a2c226ae2fdb5a40d727fd56ce1dc062f3e8daf4180148e7cc88441bc670032

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