Malicious PDF — malware analysis report

Static analysis result for SHA-256 321a3615afa4b9c4…

MALICIOUS

PDF

78.9 KB Created: 2021-03-27 20:42:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 49249b62c10e40ddb5759e2b583d0b7f SHA-1: 10c29aff16a70cb6a89b874e0a09937c0d87233f SHA-256: 321a3615afa4b9c4f95adb5493bb5e961edba4663d93beea7f6052920d4d375a
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 0.9997

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://fokemale.ru/123?utm_term=csr+4.+0+bluetooth+driver+32+bit PDF link annotation
    • https://cdn.sqhk.co/jebozibiru/VBxKid7/3d_model_planet_blender.pdfIn PDF document text
    • http://supobesopo.mygamesonline.org/36679874869.pdfIn PDF document text
    • http://mixit.info/738497444030o5ao.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/giPphcx/tepukemudinijefej.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/48025076769.pdfIn PDF document text
    • http://flowerport.store/niwuwolusavarasovixajiza5fylb.pdfIn PDF document text
    • http://barashik.space/84099790884exitn.pdfIn PDF document text
    • http://teachost.com/jopus1qgwy.pdfIn PDF document text
    • https://cdn.sqhk.co/mizenopujoli/qjdU4jb/givinutufurogoruwigakur.pdfIn PDF document text
    • https://cdn.sqhk.co/sapasimemo/hh8u0Rl/emotion-_24_voucher_code.pdfIn PDF document text
    • http://quickpapp.online/what_equipment_do_you_need_for_bbg_beginnerl1rhz.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/5563852a-4ff4-4b5e-87ca-0b5a6ae3961c/36172890285.pdfIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_c3246717c30245c2bf667b77e30c56c6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/75abecbb-b39c-4777-82d5-aea0cb521e9d/sosetumube.pdfIn PDF document text
    • http://beliraguw.onlinewebshop.net/xibaxuwe.pdfIn PDF document text
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_736928691e294d31b0cc841ba605ad18.pdf?index=trueIn PDF document text
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_ccc4cb667b594f67890916463476dbd7.pdf?index=trueIn PDF document text
    • https://dfa52777-3edb-460f-9b14-ca5101cd4ecc.filesusr.com/ugd/5360f8_397738ec374a472fb1a20fc7f3b235c6.pdf?index=trueIn PDF document text
    • https://e0bfa911-60eb-4c53-bd8d-ceec25156dfb.filesusr.com/ugd/0a052f_fd26fb911bfd4e9f951002616a0cc6d8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6d3368b-15e1-47c9-a38d-ea510ed8c2e6/how_many_playing_cards_in_a_standard_pack_without_jokers.pdfIn PDF document text
    • https://c2267750-1f6d-4c2f-944a-eb302c7f07d7.filesusr.com/ugd/93971e_7e4db7c12f53436ab50d4da683ef1242.pdf?index=trueIn 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_off0000f647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF647 5364 bytes
SHA-256: 938dceddc2b6fb810f747a5edf16359dbbbf891a0661f530edfede66c98d698d
font_01_sfnt_off00010887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10887 11232 bytes
SHA-256: 10ad430e65254d6fb36dc6453eaee955dd48308bfa84a0e698e2d11cdab38a4c

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