Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ab4d3a7598ae282…

MALICIOUS

PDF

76.9 KB Created: 2021-03-12 14:09:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 08c5bc5a15679d923484b5e32f857884 SHA-1: 9b62651b9e76d52b280ae2b835adab3f7d40702d SHA-256: 4ab4d3a7598ae2828593915dc519a1b7e28d0b3ea4fceb854d2ed0e3d85473f8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://seumenha.ru/wix?keyword=world+war+2+scavenger+hunt+answer+key PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469850/normal_5ff1f386cdbfa.pdfIn PDF document text
    • http://vitetoka.scienceontheweb.net/tegokotazuzemoru.pdfIn PDF document text
    • http://sutiboju.sportsontheweb.net/proses_bioremediasi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369786/normal_5ff65dcfeb0d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414487/normal_60272bba8221a.pdfIn PDF document text
    • http://sawedes.mywebcommunity.org/effective_presentation.pdfIn PDF document text
    • http://ebay-coupon.ru/cheddar_gorge_information_centre_postcodeqposn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443819/normal_5fc8df66b23bc.pdfIn PDF document text
    • http://hamlikjorettoop.ru/why_does_my_canon_printer_not_turn_onzu5nb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385436/normal_600aeafa79651.pdfIn PDF document text
    • http://euroshopmn.space/craftsman_lt1500_mulch_kitybpkx.pdfIn PDF document text
    • http://zesenadozefut.sportsontheweb.net/nibevigowuworirosurapefaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478422/normal_6032826a7d913.pdfIn PDF document text
    • http://vash-fasad.live/kofizanewuvra5t3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451555/normal_6031ca6113ab1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423453/normal_603eb18088b76.pdfIn PDF document text
    • http://flymoney.net/kapikubegilvtuwd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zasepo/pubotebikose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edf6bdee-2d71-4fdf-852f-3649d95f03a7/monegetimupetixediv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4ae2c3e-a197-4579-a073-bc7148f0a412/hamilton_beach_18_quart_roaster_oven_replacement_parts.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/62093393816.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/cabal_awakened_forbidden_island_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f359aa2-f400-4cfa-9e99-eb3340bf0e5a/are_homelite_chainsaws_any_good.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_off0000f064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF064 5664 bytes
SHA-256: cb1477f31d5290217478c08f361bb0a5677d8cd6ee5fea19bf8436f39ea5a6ee
font_01_sfnt_off000103cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CB 10136 bytes
SHA-256: e512e2da0c9db465f966f1c89d541c28b2f5107f91bed854a9e72679ac1eae1a

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