Malicious PDF — malware analysis report

Static analysis result for SHA-256 affb3c8e6ef1b82e…

MALICIOUS

PDF

70.6 KB Created: 2021-02-28 03:59:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 85f4056aac45f71f72af6ab289694bc5 SHA-1: 9b1f21d8811c913ac9440109d886cdd6995293f0 SHA-256: affb3c8e6ef1b82e44bd5c50e09eaa074430b7c5e81bb6bc7ad2b4b36b0519d6
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/award?keyword=burger+king+meatless+impossible+whopper+calories PDF link annotation
    • http://patajafurep.mywebcommunity.org/month_end_closing_steps_in_sap.pdfIn PDF document text
    • https://jexetapi.weebly.com/uploads/1/3/4/3/134345775/jupizuranuv.pdfIn PDF document text
    • https://cdn.sqhk.co/jotoselu/jjdhRSB/pojigikurigarime.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/longman_academic_writing_series_3.pdfIn PDF document text
    • https://bemuzulezevateb.weebly.com/uploads/1/3/4/4/134440878/darekawule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491398/normal_5fd3495d8c995.pdfIn PDF document text
    • https://sapakuso.weebly.com/uploads/1/3/5/2/135297556/9d2ee90bc.pdfIn PDF document text
    • https://cdn.sqhk.co/naxetimi/dwSwbjf/paypal_account_set_up_uk.pdfIn PDF document text
    • https://famoresarit.weebly.com/uploads/1/3/4/6/134680052/3ea10.pdfIn PDF document text
    • https://cdn.sqhk.co/midipijikami/jjjcSO6/bexoteguledumubelajef.pdfIn PDF document text
    • https://cdn.sqhk.co/mowasikuso/SZAfNij/xewakubivujelipizapiv.pdfIn PDF document text
    • https://kamutimasevukov.weebly.com/uploads/1/3/1/8/131856564/7640013.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459467/normal_5fee041adfde4.pdfIn PDF document text
    • https://fuwurobo.weebly.com/uploads/1/3/0/8/130814642/zamezupugexemu.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
    • http://jeborawaleko.atwebpages.com/how_much_should_you_feed_a_miniature_dachshund_puppy.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D8 5572 bytes
SHA-256: 8291eeef330bfddafe48f17cb65b81a914b6ce0d70b798b429d5b3132689893e
font_01_sfnt_off0000dbad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAD 10368 bytes
SHA-256: 99d61bd91c06cea1ecefc719c4f313269d3b74080c39ce78dcf1dad14d372664
font_02_sfnt_off0000ff35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF35 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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