Malicious PDF — malware analysis report

Static analysis result for SHA-256 d780c44e6a48ac6e…

MALICIOUS

PDF

78.1 KB Created: 2021-04-19 02:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e89f8e3c87ff021c59abae83a53758d2 SHA-1: 0001f38f7cc44561776eac591dc5789d78b9d77f SHA-256: d780c44e6a48ac6e1cc6f196b76b2e764aea86e321accaca2327e8d92ca221e5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('vilenefex.ru') that is likely used for phishing or to serve a second-stage payload. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially corrupted, suggests a lure related to 'Declaracion americana de los derechos humanos pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=declaracion+americana+de+los+derechos+humanos+pdf PDF link annotation
    • http://zesamoa.online/catch_me_if_you_can_play_synopsiszrye1.pdfIn PDF document text
    • http://coolvdomaion.online/99322615567xckxm.pdfIn PDF document text
    • http://chambreapp.xyz/90302569634dd8fg.pdfIn PDF document text
    • http://kemytbok.xyz/canonet_ql17_battery_compartment317do.pdfIn PDF document text
    • http://fuvisetitisenon.mypressonline.com/bitmap_to_converter_online_free.pdfIn PDF document text
    • http://jiludedo.iblogger.org/buildup_of_unanswered_email_crossword.pdfIn PDF document text
    • http://bonozowibewoz.mypressonline.com/11674627858.pdfIn PDF document text
    • http://suziterunedoloj.sportsontheweb.net/fuwamurepikesizelenuwu.pdfIn PDF document text
    • http://nikibolerobika.getenjoyment.net/62946507082.pdfIn PDF document text
    • http://interbankdigital.com/2005_chevy_malibu_ls_brake_lights_not_workingdodov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mutirexa/amphibolite_formule_chimique.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/zomejusiteseborinuviwavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16a7352d-e0de-4c1c-a475-6c6ec5e9f587/73494078836.pdfIn PDF document text
    • http://kipuredig.rf.gd/68849234332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd7bc915-e6ec-4f06-875a-f464fed92fa5/63492703540.pdfIn PDF document text
    • http://wudemexa.myartsonline.com/pidevujetawi.pdfIn PDF document text
    • http://nibopinalilabaj.onlinewebshop.net/pathophysiology_book_for_pharmacy_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/33053628114.pdfIn PDF document text
    • http://sazoser.myartsonline.com/grade_8_english_module_afro_asian_literature.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/halloween_in_french_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60410164-91f8-4da9-8b20-22ae7f04e0c3/53536645713.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf773783-c830-4ae8-8c78-654b21f8da3d/subliminal_psychology_101.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_off0000f26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26E 5396 bytes
SHA-256: 27e8ff32bdc33f166a524bc719eeb576e4c0e21d361b6344a1a5256125407561
font_01_sfnt_off0001049f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049F 11292 bytes
SHA-256: e35581d41d1b4b9e5a351286966ac78609e83a487b6a57c36aca2490d098e488

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