Malicious PDF — malware analysis report

Static analysis result for SHA-256 469ba49d234a1255…

MALICIOUS

PDF

84.5 KB Created: 2021-04-07 04:26:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 25cb5c71aac86dad27316ebef682c581 SHA-1: 225741648a1ed5bd35c4c1e997d995036cfc31a9 SHA-256: 469ba49d234a125572fafdbd234f552dfd2a9be0cf918e496cc13200919ccd35
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/award?keyword=arrangement+of+bacteria+pdf PDF link annotation
    • http://rinusiwujegabu.medianewsonline.com/navetom.pdfIn PDF document text
    • http://stonersfranchise.com/vagebafvwit.pdfIn PDF document text
    • http://dirozigumifew.scienceontheweb.net/azure_devops_server_2020_cookbook_download.pdfIn PDF document text
    • http://discout.online/little_sas_book_6th_edition_downloads431i.pdfIn PDF document text
    • http://limons.space/39767438240yjujh.pdfIn PDF document text
    • http://pitikudefojeken.getenjoyment.net/towibusafudizepewomemiv.pdfIn PDF document text
    • http://worameruvejaka.mywebcommunity.org/liwopokavixe.pdfIn PDF document text
    • http://ketrovk.xyz/can_google_maps_route_multiple_locationsswan6.pdfIn PDF document text
    • http://filfex.ru/what_is_tantric_energypng3v.pdfIn PDF document text
    • http://maturibcgj.space/moxonebiwofisadofunudu2dyi4.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/061a865e-5ce1-4683-b193-c1877090d3d3/batman_knightfall_comics_in_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27d45929-7192-4d85-9466-a0b1d1ea4e3f/49923961363.pdfIn PDF document text
    • http://pekafujojef.onlinewebshop.net/catalogo_avon_14.pdfIn PDF document text
    • http://fuvarijes.atwebpages.com/pivajewegug.pdfIn PDF document text
    • https://45180a89-8b92-4d54-a4c6-cdf0ad6af3c7.filesusr.com/ugd/2b98a3_2f8446a0c74b498aabc62a32648d80e7.pdf?index=trueIn PDF document text
    • https://3cde87c3-25ab-478b-b58d-ba072f1c7540.filesusr.com/ugd/255d97_866e0a2f59dc42b09b73364607147adf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/72d0382b-e947-4b62-9d38-851d9082c5ff/republic_of_doyle_season_3_episode_5_cast.pdfIn PDF document text
    • http://xemigososefof.atwebpages.com/can_ps3_wireless_controllers_work_on_ps4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd64e404-28a1-4e40-b345-f97a02876ad4/how_much_are_computer_classes.pdfIn PDF document text
    • https://1c2b20db-dbe1-4299-b4c0-f67d595d3b6c.filesusr.com/ugd/e71423_4d6c663ff0834c509dd91595ea83411f.pdf?index=trueIn PDF document text
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_edcc5ad3e75c4c18a2539bb501ef032c.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_off00010d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D89 5392 bytes
SHA-256: 9b28ca9d2997d95e94bf2f594593cae999e3fd0d226dc5cef82542a78305c608
font_01_sfnt_off00011fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCA 10944 bytes
SHA-256: 14fee4ed91499c647534822dbabfceb6bcbc42bf0a305dfc57e92485160809d3

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