Malicious PDF — malware analysis report

Static analysis result for SHA-256 862be722274ffe24…

MALICIOUS

PDF

90.8 KB Created: 2021-06-08 02:20:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ded5895eb41ae1d8ba1248b5571fba75 SHA-1: dae5e048cd4c0baff32a5c36d0cafcad86965dca SHA-256: 862be722274ffe247b3a4cefb2cb07d57fc685061840c9e35ad1df00525566b1
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 pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xezojetit.ru/123?utm_term=carbomastic+15+lt+product+data+sheet PDF link annotation
    • https://kilexudu.weebly.com/uploads/1/3/5/3/135347894/6088403.pdfIn PDF document text
    • https://merotulup.weebly.com/uploads/1/3/4/0/134000288/lepapasini.pdfIn PDF document text
    • https://duvozeja.weebly.com/uploads/1/3/0/7/130739152/8835744.pdfIn PDF document text
    • https://pesilukijirizi.weebly.com/uploads/1/3/4/8/134864792/e884613.pdfIn PDF document text
    • https://xapawijumoj.weebly.com/uploads/1/3/1/3/131379373/6008492.pdfIn PDF document text
    • https://defifipak.weebly.com/uploads/1/3/4/4/134442047/bixuxivumo.pdfIn PDF document text
    • https://latijivetazemor.weebly.com/uploads/1/3/0/7/130775002/tonirepe_xizopor_tevuk.pdfIn PDF document text
    • https://delazodudiz.weebly.com/uploads/1/3/4/5/134591817/3777894.pdfIn PDF document text
    • https://milorupubi.weebly.com/uploads/1/3/4/3/134317418/e0639dea8c8e.pdfIn 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/472286e5-d46e-43b5-a9c3-3642e49b9952/an_inspector_calls_movie_2015_watch_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10dd063d-6388-4c08-9cb4-33e9ef02e475/dell_latitude_e7450_ultrabook_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89852053-0130-4c90-bc46-e785d1272790/6652482136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea19c7da-4a9f-4acc-ab63-1cb0eb893038/71970549702.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0d570a2-2ad3-42f0-9ebf-ef6cc4ee3152/38067121139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ebd7155-e8eb-4884-bfa1-20618e98fae4/nofibekezoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14ac1f1d-f51f-4d7d-9acd-5dbdd4d0c441/mpsc_maths_tricks_in_marathi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a838b21-a664-45c1-adbf-f95fe826306c/gosonuzafibojamab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae440256-94f5-48c8-935e-771cf73e0f2b/dexez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d579a779-b5df-4e90-b783-1fd748a620ef/sunbeam_electric_mattress_pad_error_f2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e82dd08-90a7-437f-8ea2-6edf992486c7/25458351838.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44955ce7-fda8-4a4f-988f-c8077fba6216/how_to_clean_bissell_pet_wash_powerbrush.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45a03c10-c297-46f5-8ca9-27147706a839/how_to_use_a_cardio_glide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ea65259-e1ac-4ba4-b4db-1494717506e7/how_to_put_pictures_on_ti_nspire_cx_cas.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_off00012387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12387 5532 bytes
SHA-256: 332ae39e972f77e29d63d10efdd94c524ce028548cfdb14319d06756f079fd48
font_01_sfnt_off00013628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13628 11608 bytes
SHA-256: 4b8fa0feb3ee54e967466595342df2dee902332658ecb604fad5e50fa5e900b5

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