Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdbfc4ad3d0aa397…

MALICIOUS

PDF

118.6 KB Created: 2021-03-14 12:03:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0db34b566f0f8cfe523b93e3bec66fbb SHA-1: dd07c6644125b1ab035fdc47971a1cd54622f5ff SHA-256: bdbfc4ad3d0aa397a3c5181c520b6fe06ac3d085bb9d94eee76b27f0a0c6c404
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or SEO poisoning tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The embedded URLs and the document's structure point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/wb?keyword=how%20much%20does%20a%20porsche%20928%20cost PDF link annotation
    • http://everydayy.fun/mezcla_frigorifica_explicacion3ls4q.pdfIn PDF document text
    • http://eduha.online/google_books_to_converterfwgl2.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/jwUFgiY/nicki_minaj_songs_2020.pdfIn PDF document text
    • http://itanah.space/best_investment_for_2021_uk4v7fk.pdfIn PDF document text
    • https://cdn.sqhk.co/zovaratigu/a8jjhcG/maze_runner_2_full_movie_download.pdfIn PDF document text
    • https://cdn.sqhk.co/josurowelimu/niaQGhd/53257948041.pdfIn PDF document text
    • http://boothattendant.com/asm_fmcg_biharhfp3g.pdfIn PDF document text
    • http://organicnu.info/tcl_roku_tv_50_inche7xij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://4328a374-8b5c-4134-9cef-e132ca5fc89d.filesusr.com/ugd/6732b1_f60b41f01e27432ab70cf49c18e5fec6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2a245e6-0cf3-43ff-9ad2-9ce5402344cd/how_much_oxygen_can_a_venturi_mask_deliver.pdfIn PDF document text
    • https://00407fa8-a9ef-4b78-9bbe-46147fc8acf6.filesusr.com/ugd/5ecadc_d96a5e9c47bc4650afe0697711e4c824.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9645e166-578f-4355-83b7-e5a6f2fe923b/87876727758.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27de7f88-6e6a-4760-bdba-36c1655a9879/27236476240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61e6b5b6-d3c9-40dd-91be-c86c8582deaa/juwizojalaveba.pdfIn PDF document text
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_5fd5b618c46446aab1a878030671305c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a11e5db3-11e1-4da6-801e-73f176cde25c/bissell_proheat_12_amps_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84a2fd96-18fd-474a-81c2-9a6ea11beb12/7611993816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbfe1e19-fa60-4083-a459-f5b685424da0/how_many_calories_in_a_plate_from_panda_express.pdfIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_fdf74905412d435cae06e2eb9ee2a3cd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e441443-707b-4daa-b2ce-e4df61b63fc0/66160571165.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016b63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B63 5544 bytes
SHA-256: 84065efe3d0243d25ec63eb3962f4ba600324b6fcc5c82e24dafa7dc79ca7cc9
font_01_sfnt_off00017e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E45 12716 bytes
SHA-256: c8f67e22da9e1b3838c8064cff88bde28fb2e3bf14819064f27f45e2d96ead4e
font_02_sfnt_off0001a83f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A83F 16060 bytes
SHA-256: 713933360072c9d59346590fad668f98c3603c6d2b72ed941ce85481f6af0b74
font_03_sfnt_off0001bcd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BCD1 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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