Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f0e330f22dc7a2e…

MALICIOUS

PDF

78.2 KB Created: 2021-05-10 18:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f686fe2ef1dfbd4ac360dc1f908be414 SHA-1: e019f7a1da7c447e534c845c602ec531508e3b43 SHA-256: 3f0e330f22dc7a2e5d7764e7aa5f2013bee3cf49feb7824d75a0b33a7b519616
126 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting a phishing or redirection attempt. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a deliberate effort to create a link farm on disposable hosting, reinforcing the malicious intent. No scripts were extracted, but the overall structure and URL distribution point towards a lure for users to click on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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=is+the+dyson+v11+worth+it PDF link annotation
    • https://sipedevete.weebly.com/uploads/1/3/1/4/131438766/3404021.pdfIn PDF document text
    • http://pobesegu.scienceontheweb.net/57209203364.pdfIn PDF document text
    • http://top-odejda.com/soundarya_lahari_song_lyrics_telugu6mbwl.pdfIn PDF document text
    • https://dexazime.weebly.com/uploads/1/3/1/4/131437554/76e88656d68961.pdfIn PDF document text
    • http://50offstore.pro/best_wilderness_survival_kitevwhr.pdfIn PDF document text
    • https://xojozojejaxito.weebly.com/uploads/1/3/4/8/134866115/rebemanota-bowur.pdfIn PDF document text
    • http://bilkaita.space/69515939018aksu8.pdfIn PDF document text
    • http://shop50off.info/how_much_does_a_name_change_cost_in_ontariohgtf5.pdfIn PDF document text
    • http://crysety.xyz/what_are_the_core_values_of_teaching9svu3.pdfIn PDF document text
    • http://zubiki.top/how_to_write_a_job_description_letternvw05.pdfIn PDF document text
    • http://trysoda.pro/72992184760o72yy.pdfIn PDF document text
    • http://extrameets.fun/xunedifasemaa573n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_9aecb2dd4e8d4187adb491bf54090406.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/40100147125.pdfIn PDF document text
    • https://4e4608fd-868e-43f5-b6ba-14e5e4b50785.filesusr.com/ugd/b1f235_bd4ac2c052774fb28a4cd099ebeb69e5.pdf?index=trueIn PDF document text
    • http://pozijawikubinun.myartsonline.com/27373934438.pdfIn PDF document text
    • https://4cd5eafb-d261-4666-a528-29b55b1676c1.filesusr.com/ugd/8dde66_cd45b4aa21f244858f3b0aafc2558c8a.pdf?index=trueIn PDF document text
    • https://4bc473c2-84d0-4913-8b4e-281bf44fba2e.filesusr.com/ugd/a25dbd_23e0cc6d32f340abbfca92b4aa07e80a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lofese/97769211837.pdfIn PDF document text
    • https://959e49da-b405-4961-97d4-5c1bb2e9a628.filesusr.com/ugd/ab0441_73f0dd9ad9fb47d49ef9f9ddf01a5bea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/2015_chevy_sonic_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/mibinedewogibanufutarof.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BE 4916 bytes
SHA-256: 2a42c598af62ed4ee2ee2a990e5d2a7317733fccbf900d2eca7824755634f3c6
font_01_sfnt_off0001058d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058D 11108 bytes
SHA-256: 079a6d16cf629ab56f80c1f0338bc1ea57b732b5e42b03a913225cfb5e0697b2

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