Malicious PDF — malware analysis report

Static analysis result for SHA-256 f76bc8e21a4be035…

MALICIOUS

PDF

78.2 KB Created: 2021-04-07 12:37:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a36f25f16e92601b33337e0f3e5781ad SHA-1: 8d00c950d7a483fd551740d9a7cf775a400360e8 SHA-256: f76bc8e21a4be035d365022e973861890085026c2429ce92fa98a575818f534f
156 Risk Score

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 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/aws?utm_term=reliance+606+water+heater+element+part+number PDF link annotation
    • http://lavkavkusa.store/05_jeep_grand_cherokee_intermittent_no_start7vkm5.pdfIn PDF document text
    • https://venevivoxeda.weebly.com/uploads/1/3/1/8/131857756/zufuj.pdfIn PDF document text
    • http://idealica-italy.site/dd_2nd_edition_classes1g0in.pdfIn PDF document text
    • http://lnstagramverifiedbadgeservice.com/smart_board_projector_cost8yprg.pdfIn PDF document text
    • https://nofakuxuwuxow.weebly.com/uploads/1/3/4/6/134684799/figewitaj_pupamujotinode_zigofagoza.pdfIn PDF document text
    • http://gnoogle.site/simply_southern_size_guidemxtph.pdfIn PDF document text
    • http://ekzo-fruit.ru/piwegggziq.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/vukusa/40423545688.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/appendix-_14_form_of_nomination.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/who_is_the_strongest_fishman_one_piece.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/marriott_bonvoy_app.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/40912868947.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/beach_buggy_racing_2_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/65811950401.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/flannelette_sheets_king_single_bed.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/embed_javascript_in_html_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/unbreakable_confidence_book.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/bodovafawekezo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF461 5528 bytes
SHA-256: 94969bf2388e9917de50862b6cd0e0f2e3aa69858b486d3b7c576b90e72c4b66
font_01_sfnt_off0001070e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070E 10552 bytes
SHA-256: 02bdc618aa0778d454c308daea15de775d5a386bf91da889e9eb8bb6361123d7

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