Malicious PDF — malware analysis report

Static analysis result for SHA-256 d186ace594a4b782…

MALICIOUS

PDF

96.7 KB Created: 2021-04-12 23:07:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ee1f706e9baf444b748f4cbc2d4bc01c SHA-1: 5b2797b0d7e3d755e72de01188a76e324a92658b SHA-256: d186ace594a4b782f4e7abc6ebd2829ab702c55dd6a41e417a0bd7f2cf2eaca4
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9996

Heuristics 6

  • 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.
  • AcroForm button with action trigger low PDF_ACROFORM_BUTTON
    PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
  • 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://xajibur.ru/strik?utm_term=samsung+vrt+steam+washer+parts+manual PDF link annotation
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://nonly.xyz/how_do_you_write_an_equation_in_slope_intercept_form_calculator2r304.pdfIn PDF document text
    • http://boguzimaro.getenjoyment.net/wowuzajolunoka.pdfIn PDF document text
    • http://giwudogor.scienceontheweb.net/dedonabifaxiga.pdfIn PDF document text
    • http://wumiwuzigimo.mywebcommunity.org/30944831836.pdfIn PDF document text
    • http://wisatemubudu.medianewsonline.com/55431476164.pdfIn PDF document text
    • http://instapriz24.site/8878119572sy24i.pdfIn PDF document text
    • http://bestunew.xyz/what_does_violent_media_meanzdh93.pdfIn PDF document text
    • http://rastet-malysh.ru/tezanesebejaxudifomak69.pdfIn PDF document text
    • http://tokesuditetu.getenjoyment.net/how_to_factory_reset_iphone_without_passcode_and_without_computer.pdfIn PDF document text
    • http://zathkatow.xyz/pefugafamifexaq2jp2.pdfIn PDF document text
    • http://salleapp.xyz/insanity_exercisesn0gqp.pdfIn PDF document text
    • http://sigixexizo.sportsontheweb.net/zumarebubakovokakan.pdfIn PDF document text
    • http://astrohelp.space/gekitoxojusabiwizelakenxrrow.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/76cea527-d074-474a-ade8-21d49db02f79/55966073673.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77c2305e-e94d-4b5b-b25e-47149c36259f/vikuvemuzuwizak.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/abhay_video_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/046a9447-d98c-48b0-bdea-3f1d401495b5/how_to_get_rid_of_a_pimple_on_your_lip_wikihow.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/nefutikutif.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/scholar_ffxiv_5._0_guide.pdfIn PDF document text
    • http://senesijosezetu.myartsonline.com/logical_organization_of_computer.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/types_of_cells_and_their_organelles_worksheet.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_off00013749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13749 5488 bytes
SHA-256: 0dcb9c888a2e4d674ce41488d02b29e2ad9eead7f817875418ec68481e857978
font_01_sfnt_off000149dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149DD 13268 bytes
SHA-256: cd1967a5c472a7e05724d9c905dfd041f7b8348648f30d941d793af2147a8f59

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