Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc4c632f0d577f09…

MALICIOUS

PDF

81.3 KB Created: 2021-03-11 09:52:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 87a0d7be5b618ccdd16885ee800cfdd4 SHA-1: 76a9a1f3dde4af18de3dca8bf6bfd309e44c323f SHA-256: fc4c632f0d577f09172ee743c432fb47628bffb93c4646f75c894a8b94f61955
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure itself is designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 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://leonvi.ru/strik?utm_term=shatter+meaning+in+tamil PDF link annotation
    • https://mofafodoler.weebly.com/uploads/1/3/0/8/130874416/lasaz-xiserenamulufe.pdfIn PDF document text
    • https://kasutuwisuruja.weebly.com/uploads/1/3/1/8/131872017/dajorewepej.pdfIn PDF document text
    • https://vawisopikev.weebly.com/uploads/1/3/2/7/132740649/wigasox_ponaziposalixip.pdfIn PDF document text
    • http://frasqen.online/long_acrylic_nails_coffin_shapet2pbl.pdfIn PDF document text
    • https://kolenogu.weebly.com/uploads/1/3/1/8/131871799/3880899ee9a4b8a.pdfIn PDF document text
    • https://kaferafodi.weebly.com/uploads/1/3/0/7/130775544/91856fecb2.pdfIn PDF document text
    • https://nenomoxemobare.weebly.com/uploads/1/3/6/0/136010140/0fe83.pdfIn PDF document text
    • http://mumopajikex.mygamesonline.org/ethical_hacking_for_beginners_2020_book.pdfIn PDF document text
    • https://bisatabezuniv.weebly.com/uploads/1/3/1/3/131398333/davazebarafu.pdfIn PDF document text
    • http://hookup668.site/can_i_take_the_paddle_out_of_bread_machineiytn2.pdfIn PDF document text
    • http://ferafukapawap.scienceontheweb.net/jodezusive.pdfIn PDF document text
    • https://punizino.weebly.com/uploads/1/3/4/3/134327780/a2f58e.pdfIn PDF document text
    • http://parrrtner.xyz/99196025310pzkgh.pdfIn PDF document text
    • https://bexubumid.weebly.com/uploads/1/3/4/0/134040754/zosazixaja-resirewijapawon-basobitafovuwib.pdfIn PDF document text
    • http://wordsideget.top/does_taco_bell_still_have_5_dollar_nacho_boxtxi5p.pdfIn PDF document text
    • https://jaxipalat.weebly.com/uploads/1/3/4/7/134746428/rumusutafelezatisa.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
    • http://rawigukegopafot.onlinewebshop.net/what_is_the_shortcut_key_for_display_properties.pdfIn PDF document text
    • http://tobikinos.onlinewebshop.net/tetaxaporijevuz.pdfIn PDF document text
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_015a95779cf647a187e571a377ee6241.pdf?index=trueIn PDF document text
    • https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_63de0414b4aa4eccbf054e5e16eb9b01.pdf?index=trueIn PDF document text
    • https://459fb65c-52af-4c88-885a-43a44fbeaf25.filesusr.com/ugd/6a7407_bdcab2daf7544a72925b1688133dcd0f.pdf?index=trueIn PDF document text
    • https://8c285b57-3156-47ce-881b-df665acc117b.filesusr.com/ugd/8d46c2_7241cd7fc4824ba580642b589b11d6e3.pdf?index=trueIn PDF document text
    • http://liduvitulugug.onlinewebshop.net/63476540772.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB02 5024 bytes
SHA-256: 98c4fd2e392a15de6a9401dab92e820e0bf76420f1feb423911ba1d66c784dd8
font_01_sfnt_off0000fbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE4 4956 bytes
SHA-256: e6c0ad3c79bf79b842097a65c677122e63e0feb016bb01f40f01882a70e072be
font_02_sfnt_off00010c08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C08 14020 bytes
SHA-256: 30b5f231502735e6cda49392960bd9100bba5895787510ae40e116f1de24b990

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