Malicious PDF — malware analysis report

Static analysis result for SHA-256 2004d531638fe156…

MALICIOUS

PDF

77.6 KB Created: 2021-04-06 09:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 65ded52715906ee303333adec25c90ee SHA-1: 5202018bb07c0e487bc7b01d072dd8323f1f2f94 SHA-256: 2004d531638fe15629f5cee6f44b83d5ca54956fe4fb142ea1ad3af472fb4fa5
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://mezovuduw.ru/wix?keyword=dbt+made+simple+pdf PDF link annotation
    • http://kosamaritaj.getenjoyment.net/diary_of_wimpy_kid_book_set.pdfIn PDF document text
    • https://bakukumi.weebly.com/uploads/1/3/4/4/134437371/pevojakev.pdfIn PDF document text
    • http://dipenoguzel.sportsontheweb.net/febelef.pdfIn PDF document text
    • https://suvamowifav.weebly.com/uploads/1/3/4/3/134351486/fb85ed67b1.pdfIn PDF document text
    • http://waranijovuv.sportsontheweb.net/14297962791.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/nemusozejekepaxusegutise.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/a5fd80d4-6e85-489a-ad95-49e9ce200501/5337266661.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/autodesk_autocad_electrical.pdfIn PDF document text
    • https://e8b83640-91e4-44a0-a69f-c2468797902f.filesusr.com/ugd/ee4a13_a04b5e97f9874a7588a96b72dcdb0b1a.pdf?index=trueIn PDF document text
    • https://9764c975-acb6-4bd5-a3ff-b1f4624bc9bc.filesusr.com/ugd/5bcb7b_2c3366c0bc3043bc96be9355f0eeb0fb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sitok/guidelines_for_treatment_of_coarctation_of_aorta.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/agile_testing_istqb_tester_extension_certification.pdfIn PDF document text
    • http://sisufovofow.atwebpages.com/siropivitojunug.pdfIn PDF document text
    • http://vubelifijam.atwebpages.com/adobe_premiere_elements_2.0_download.pdfIn PDF document text
    • https://9f1be152-2ea1-4306-981d-bfff62ad382d.filesusr.com/ugd/08fb22_0be0c3307e1e48b4896dce0734db3043.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/how_many_btu_is_a_mr_heater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85427374-437f-474c-89e6-39312547b1fb/how_to_hard_reset_moto_g6_plus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebde6125-39c7-4017-9ed0-ab0f056ac4a8/gujaxowekidelumuvexatim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8f6dc5c-db2f-4e9a-a2d8-4c51f79040ce/how_much_is_a_2015_jeep_wrangler_rubicon.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_off0000f2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D8 5232 bytes
SHA-256: bd720ce9cea36d705def43bb7f11c5ca04a91e3859b47babb7cf970f673f6272
font_01_sfnt_off0001048e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048E 10688 bytes
SHA-256: 91498adde76f2ea106bf851935fe5117257a7ad3602cd146159f3473471f742d

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