Malicious PDF — malware analysis report

Static analysis result for SHA-256 86215fdc8859b900…

MALICIOUS

PDF

100.6 KB Created: 2021-03-10 02:12:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c8eff58d8aedfca134c3931025e72a45 SHA-1: 375509b8398b6956495549729cb82dae9258a7fd SHA-256: 86215fdc8859b900ee5275d4f6459ed23829a899f11cd6c154bbb52be5b50d5b
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 0.9994

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://vilenefex.ru/award?keyword=sarmiento+civilization+and+barbarism+pdf PDF link annotation
    • https://perasukene.weebly.com/uploads/1/3/4/6/134644841/365930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419191/normal_603de21526d38.pdfIn PDF document text
    • http://test123test.xyz/books_in_the_michael_vey_serieslvzzm.pdfIn PDF document text
    • https://cdn.sqhk.co/sifilefu/33Qyvib/jurassic_survival_game_download_for_android.pdfIn PDF document text
    • https://tejifogigevavep.weebly.com/uploads/1/3/4/6/134675995/jewofukobokuzi.pdfIn PDF document text
    • https://cdn.sqhk.co/gopilufifeda/hjaheQn/halloween_bingo_card_generator.pdfIn PDF document text
    • http://comp-arenda.site/gotamabusaz6oh10.pdfIn PDF document text
    • https://cdn.sqhk.co/liminekaj/if9hgVg/history_of_marco_polo_hong_kong_hotel_address.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408170/normal_5feb100048b0d.pdfIn PDF document text
    • https://cdn.sqhk.co/ropobemuma/3jiBcRS/najijenenufixaxapigod.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/heiZi1l/dank_tanks_pesticides.pdfIn PDF document text
    • http://topvideo.design/three_types_of_causal_comparative_researchhgf1q.pdfIn PDF document text
    • http://cz-nitrof.website/48749535256nlg06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390371/normal_6029074e6cc13.pdfIn PDF document text
    • https://fufiwixafuwisu.weebly.com/uploads/1/3/4/7/134770326/239437.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
    • https://s3.amazonaws.com/juliziwojatige/platform_sneakers_outfits_tumblr.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/event_briefing_document_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c964dea-414c-408c-ad4a-4323f65889ff/85253572604.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/loganukojuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/wasosimor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df0c6d83-78fb-4911-a41e-e6e4cf502072/90525624591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7376ccf-81f9-4eb3-bd94-526565ae34e0/wuwalipugunodurija.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_off000135ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135EF 5444 bytes
SHA-256: 284d9f51de21cc424a79bf767e2cd818057ae646517053fb1b4a1baf1a9d4035
font_01_sfnt_off0001484f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1484F 15048 bytes
SHA-256: 287e2f01b2c0bfc097187fa5b42f14cac0966176d95590d5ce3ae217f163d36a
font_02_sfnt_off000176e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176E2 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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