Malicious PDF — malware analysis report

Static analysis result for SHA-256 722881ee63cdb084…

MALICIOUS

PDF

77.1 KB Created: 2021-02-25 17:19:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: cfe4ec2be2dedec318a61a6eaaa6637d SHA-1: 3151e2c5919b1533c77da64f15479dcc3786a8d1 SHA-256: 722881ee63cdb0849ba90aeb390bd9bfce3898ae13aeeeb2ec2c17224ced6bef
166 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with a high-confidence heuristic indicating a payment redirection lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into compromising financial details or downloading further malware. The presence of embedded URLs and the nature of the heuristics point towards a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://druttle.ru/123?utm_term=harry+potter+character+quiz+pottermore PDF link annotation
    • https://cdn.sqhk.co/jotepomi/udifUgj/infinity_war_cast_red_skull.pdfIn PDF document text
    • http://stakingyfi.com/rabupufiputosigalarauganp.pdfIn PDF document text
    • http://my-favshopc.online/nejokidovemujuhgeqx.pdfIn PDF document text
    • http://jedomagisuw.getenjoyment.net/fatazirifelutagek.pdfIn PDF document text
    • https://cdn.sqhk.co/ponesigis/2vhjewA/lotedosipetonaz.pdfIn PDF document text
    • http://flash-sar.online/dewalt_dw402_brush_replacementl546y.pdfIn PDF document text
    • http://feedbacrnz.space/84064286761vrzuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476302/normal_60171187523cf.pdfIn PDF document text
    • http://raicen.com/dormouse_facts_sheetutv1t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417418/normal_601fb3cda2191.pdfIn PDF document text
    • http://copyrightshelpcenter.com/10065683998sq6jp.pdfIn PDF document text
    • http://tuderoba.getenjoyment.net/13642655946.pdfIn PDF document text
    • http://pubggaming.online/computer_hardware_examples_for_resume3a2l1.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/aghjehh/5266557341.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/fyjgrhb/suzetirikalexawob.pdfIn PDF document text
    • http://fixmarker.fun/branding_strategy_of_niken6v1y.pdfIn PDF document text
    • http://casbah2point0.com/3292866650pxayl.pdfIn PDF document text
    • https://cdn.sqhk.co/tinajugezepi/ejghaFt/62417503816.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402478/normal_5fdee0e9445c3.pdfIn PDF document text
    • http://hushseo.online/tibinumsi9n.pdfIn PDF document text
    • http://aazzzry.space/tuxetafazogunua5ue4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sajulugebimisu.myartsonline.com/how_to_program_schlage_touchscreen_deadbolt.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_off0000efee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEE 5200 bytes
SHA-256: 629a06bc827f897bdf4ed9d0955b84d781332bc65d6b0625878869447b241b38
font_01_sfnt_off0001018e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018E 10848 bytes
SHA-256: 770caa8f325028fe5ccd8c06020ef50d11d58a0dbbc79f847952457952831450

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