Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3af99ad7a742d1c…

MALICIOUS

PDF

78.7 KB Created: 2021-04-23 02:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b3ecdbf68aabbb6ea9b6b043f1aaae25 SHA-1: 128223867280d8757351234c2b5a6dbef5a562ca SHA-256: d3af99ad7a742d1c29a07ca9bd32404a00c0b41fc33ccfd2d86493be84cabbea
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 0.9998

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://xezojetit.ru/strik?utm_term=minecraft+combat+handbook+pdf PDF link annotation
    • http://lasiwefomibew.sportsontheweb.net/acls_study_guide_5th_edition.pdfIn PDF document text
    • http://xviiivbgz.com/selodutukeludagotava4xxs.pdfIn PDF document text
    • http://topcabinets.xyz/fibutokoxuwovomopa8mmky.pdfIn PDF document text
    • http://defokozixeral.sportsontheweb.net/97125893582.pdfIn PDF document text
    • http://fitdieta.com/zuxefotufejauh713.pdfIn PDF document text
    • http://beautysale.site/evinrude_e-tec_150_owners_manuald1ubo.pdfIn PDF document text
    • http://salea.site/what_is_present_perfect_tense_with_examples5atah.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/sgil8ie/baby_back_ribs_on_grilled_recipe.pdfIn PDF document text
    • https://cdn.sqhk.co/puwipaneke/fzgfjcD/quads_superheroes_stunt_racing_games.pdfIn PDF document text
    • http://letxxnx.org/how_to_win_free_diamonds_on_chaptersert3t.pdfIn PDF document text
    • http://e-devletodeme.net/loroshi6jv.pdfIn PDF document text
    • http://vilopeg.xyz/fisizonofifokit7kc3.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://uploads.strikinglycdn.com/files/067a175c-ca2d-4dac-accc-d9025b9378c8/98374914151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bf97aaa-84b9-4c69-929f-3e8cb0096490/facebook_marketplace_categories_calgary_cars.pdfIn PDF document text
    • https://2863666b-9d79-467d-9aad-9eeb6dafbdf2.filesusr.com/ugd/6ee3eb_40458772bef643958a342cc1b7b7ee7b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba50aa50-ab5a-49a0-acdc-0f9169e6ecda/4_pics_1_word_level_260_answer_7_letters.pdfIn PDF document text
    • https://30de3caf-c510-4ce9-8691-b8280dc60d9b.filesusr.com/ugd/4980ee_061d6a2553ab471a9314a34ddb099e37.pdf?index=trueIn PDF document text
    • http://tifavamifikas.myartsonline.com/93145226044.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_off0000ea1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1C 5184 bytes
SHA-256: 652702670341239a6cfbf296f160f7de50811adff6e2981d9d66b01c64167003
font_01_sfnt_off0000fb7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7D 10568 bytes
SHA-256: a22e1b4e454e491cec23bd457292b5d17dc0dbe6dbb3f2efa2b5dab7faac51e5
font_02_sfnt_off00011f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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