Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d79c871323a7b6c…

MALICIOUS

PDF

79.3 KB Created: 2021-04-04 23:24:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8bcd28ac625c13eff9e182a741f72bad SHA-1: 7375b0024acfccf50c695a0e3b7a01cbbd9dfe9b SHA-256: 4d79c871323a7b6c0e2c43674305ba830935bea7f58ddb8f42828d6bc2b0a8e9
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable domains or are used in a link farm. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution. While no scripts were extracted, the structure and URL patterns suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/strik?utm_term=the+night+manager+streaming+season+1 PDF link annotation
    • http://about-fb-support.com/las_chicas_de_alambre_sinopsis1huyr.pdfIn PDF document text
    • https://cdn.sqhk.co/takepoladev/he0Gvih/20639946517.pdfIn PDF document text
    • http://uabiomanix.xyz/how_do_cash_dividends_affect_cost_basisvo3mb.pdfIn PDF document text
    • http://seamanygau.best/the_greatest_salesman_in_the_world_telugu_free_downloads5bo6.pdfIn PDF document text
    • http://tesar-krd.ru/the_end_hot_sauce_scovillepj8rn.pdfIn PDF document text
    • http://mexicotop.xyz/79881788792zc1z0.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/ghfonZE/80216826822.pdfIn PDF document text
    • http://presalle.xyz/cayman_islands_company_register_number_formatgqvlk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/76de3cec-5eee-409b-a919-767c8c740d84/how_to_use_a_youtube_video_as_a_ringtone.pdfIn PDF document text
    • https://aed0ee3a-d217-4696-a563-de9ff15d6c37.filesusr.com/ugd/f80e3f_ec423027ece44fc6868adcdea4eff453.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/882f1cfc-30e8-4b64-9137-eb4f571d1c08/jegexusupizabixapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4df87405-3ecc-4784-ad60-9e7aff3c4df4/gimefabudosokopob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca1f5bb5-c276-4acc-80f4-8a52b3e0512c/what_is_the_purpose_of_structured_query_language.pdfIn PDF document text
    • https://34e51215-b586-4e01-b3ea-a219475a7b91.filesusr.com/ugd/46481b_82e311c1328246a897e981ea0474cd9c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/13039a04-787a-4709-94d5-0ef8ba18a326/geometry_survey_7.3_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/791248db-6224-4e5a-abf2-68551f79fad4/how_to_make_excel_formulas_permanent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa0496d9-68c1-4ec1-b957-5ed1e4e2ed4e/where_is_the_power_steering_pump_located_on_a_2007_pontiac_grand_prix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3fa0bb3-4fab-48db-9b41-34755d05367e/maytag_3000_series_washer_f70_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38964d7a-fe41-4a42-8922-e2b6822f9ce7/newoxuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c588b236-d9ed-4cef-9edd-4a148f7e9803/walatevalefunixiku.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C1 5068 bytes
SHA-256: d238fdde9327e978cae36619c34ad1e993de1eb61d9bfe0081e6c3930d4dc060
font_01_sfnt_off0000e9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D2 2656 bytes
SHA-256: 1620336da6018abf771a3b64a4739dbc5cc5761e5bcfd31f9568e9163b5e6178
font_02_sfnt_off0000f4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D8 2108 bytes
SHA-256: b3976ad28991401f3a7e0d936621f3963ed8fd81aff5bedc9e25cf6548b1959b
font_03_sfnt_off0000feae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAE 10548 bytes
SHA-256: 6474f8a7cf45d66e0e04a04e9260e9e51b5e443ddf10229181963a9b09af069a
font_04_sfnt_off000122dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122DC 2832 bytes
SHA-256: ab0b30550c16f0218ea180a56450acc25083be48fb805cb0f6f475dfa13b8319

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