Malicious PDF — malware analysis report

Static analysis result for SHA-256 83a6a48ea9472a78…

MALICIOUS

PDF

78.1 KB Created: 2021-03-21 07:59:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c25da1b315c115e1cd074da71e21c1b4 SHA-1: b10306412a14c9c657d9a79cd34e0d8ae785276c SHA-256: 83a6a48ea9472a7829bb7a89d52041047cccaf379983e33b9d1eb9ccce14c56d
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://mezovuduw.ru/123?utm_term=bluetooth+lapel+mic+for+android PDF link annotation
    • https://cdn.sqhk.co/konidadelan/RgeHgin/34419130405.pdfIn PDF document text
    • http://reduslim-europa.site/33372724844z7d59.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/Sgcibid/favadofitixonifateradat.pdfIn PDF document text
    • http://copyrightprivacy.site/kong_skull_island_full_movie_mp4_downjq94.pdfIn PDF document text
    • http://lidzadva.xyz/pirates_of_the_caribbean_sheet_music_trumpetwynq4.pdfIn PDF document text
    • http://1cats.space/journal_of_wavelets_multiresolution_and_information_processinge3rmj.pdfIn PDF document text
    • https://cdn.sqhk.co/ferudati/icYifjX/littlest_pet_shop_your_world_app.pdfIn PDF document text
    • http://contact-git.top/84383835905epka9.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/nhjwD2n/85131071323.pdfIn PDF document text
    • http://getliterate.online/258719396960awc2.pdfIn PDF document text
    • https://sovajavab.weebly.com/uploads/1/3/4/0/134041947/d9e56c6e.pdfIn PDF document text
    • https://xosuloduviz.weebly.com/uploads/1/3/4/8/134890731/guverumoriges_sokosofoxow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c6506652-bf5e-4f52-be36-03dbfaede22c.filesusr.com/ugd/f74919_9e91c64933b24822bb6a866215c97d0a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9083902-73f7-4699-8d67-354d67f6366f/fozilukirivazaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f45d5f30-514b-4f5e-8607-eec411a4e1e6/67799332401.pdfIn PDF document text
    • https://1794ee33-230d-455b-98b1-84d48067edce.filesusr.com/ugd/551769_c768dcb1ff3e45088232756eff731b29.pdf?index=trueIn PDF document text
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_ffd75d9ab9c04a4c860cecaaa2049157.pdf?index=trueIn PDF document text
    • https://87da31d5-d184-45e7-a456-0ad082c8bd65.filesusr.com/ugd/55e94a_423f28f1a9dc430bb4b24a908bed2dc2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d6ebde2-0871-4252-9e7e-0f57b5ff076b/pufupuvesofevikukake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6583f4c9-d7f6-49bf-b66e-611d9b9df634/intermec_pm43c_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04cc1c69-426d-45d7-b62e-8a0001689b9d/firehouse_medium_turkey_sub_calories.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_off0000f421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF421 5264 bytes
SHA-256: c937c8571dda85f3a53f117b6e6d604d9310abbec082502af6b9b47844ab06e9
font_01_sfnt_off000105e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E2 10916 bytes
SHA-256: ef1ad7a6d2d9004cd79794d41f81276607a1e137b34edeecc3dd3856d1e7421a

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