Malicious PDF — malware analysis report

Static analysis result for SHA-256 72dd5f56abf3ac8e…

MALICIOUS

PDF

75.5 KB Created: 2021-03-14 02:16:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 83c517285783c4fab3d0e8630f5361a8 SHA-1: 9419c3ce82eaf499c0b339185f21aab15c559312 SHA-256: 72dd5f56abf3ac8ec305f6858da0238030fecfbf9bc06a393bf97ad98c0d2c86
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 0.9995

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://pelibifir.ru/wix?keyword=yousician+pro+apk+free+download PDF link annotation
    • http://sevowina.medianewsonline.com/40413532762.pdfIn PDF document text
    • https://cdn.sqhk.co/bobofibu/lhjgfEw/linezidovewemosegasem.pdfIn PDF document text
    • http://demuxum.getenjoyment.net/xilokejotuzijakususo.pdfIn PDF document text
    • http://wupemokabate.scienceontheweb.net/24366822729.pdfIn PDF document text
    • http://vimabanu.sportsontheweb.net/gujol.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/JqNhdhg/ivory_ella_logo.pdfIn PDF document text
    • http://fegivate.medianewsonline.com/2813963317.pdfIn PDF document text
    • https://cdn.sqhk.co/felibepudu/6qRgihe/nevivavigep.pdfIn PDF document text
    • http://powuvomewekuxeb.getenjoyment.net/2000_jeep_grand_cherokee_check_engine_light_on_but_no_codes.pdfIn PDF document text
    • http://fujigukatujewu.medianewsonline.com/43297680566.pdfIn PDF document text
    • https://cdn.sqhk.co/wisulekekij/fZhf2RG/uber_driver_sign_up_promo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9e2bb560-353e-4f5d-a08b-1363560edab4.filesusr.com/ugd/6c032c_67c369d1daa8460d82c7b5b855393744.pdf?index=trueIn PDF document text
    • https://9f53eded-325d-4e02-8430-7c09bd872488.filesusr.com/ugd/e04405_9a170fc23e424c46bb90bac982e247bc.pdf?index=trueIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_181d29986f7b488eafaf646ba0973cfd.pdf?index=trueIn PDF document text
    • http://ledufowi.myartsonline.com/63977160859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8abdfc85-5ea4-40be-9792-3501d0ec9b12/nozozizuwegodimixurawad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7557c7e2-74fa-45f4-bd41-b11d9fc1d9ce/easy_origami_with_printer_paper.pdfIn PDF document text
    • https://598a1783-db1d-4ebb-96f5-d3ad23e1e090.filesusr.com/ugd/ae99eb_ce6c3b7186ce44f6873339194fa60942.pdf?index=trueIn PDF document text
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_25999a442a404f4889e2a39dee56d24b.pdf?index=trueIn PDF document text
    • https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_8317fbe2eb22497d9aab1e59d3991ecd.pdf?index=trueIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_388d2bed2c7d454ba4103a2879e37c20.pdf?index=trueIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_23615e3841cd4bd3b1fdf3c4d4b4ef18.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_off0000ea05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA05 5268 bytes
SHA-256: adcb7caf791a0109ac40b6046cc2df32954d166ac00e9fc1779c927c89246fbd
font_01_sfnt_off0000fc17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC17 10624 bytes
SHA-256: 5f5ec9877b97883f753b019966f29e7ea15cfb696323a80bea8ac540ac2817c2

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