Malicious PDF — malware analysis report

Static analysis result for SHA-256 42de463b0be69044…

MALICIOUS

PDF

88.9 KB Created: 2021-08-01 02:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e436263bf5abe04a78d0ec1d9d206b9f SHA-1: 309eab416c3bda032314fd341a4ab20355fcf7f1 SHA-256: 42de463b0be69044222273afd56d9c9603fc90879706ad8a3a12bd688318a6b3
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam and payment redirection lure. It contains numerous links to external PDF files hosted on various domains, many of which appear to be compromised or disposable, suggesting a tactic to distribute malicious content or phish for credentials. The document's structure and embedded links strongly indicate an attempt to deceive users into fraudulent financial transactions or prize claims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://wisserarm.nl/app/webroot/files/userfiles/files/57671654198.pdf In PDF document text
    • https://maviet.vn/upload/files/zebokafukizobinikupe.pdfIn PDF document text
    • http://vnos.vn/app/webroot/uploads/files/zigajemamesitono.pdfIn PDF document text
    • https://h1t-urlaurora1-turbo.com/contents//files/rizokigifepibifezosima.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080022de3a9c---96605305257.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/51cd971982aa3a1a2fe8cd2a762380d3/32380670126.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/newisaxemekixemalovukobil.pdfIn PDF document text
    • http://maility.pl_adresuserfiles/file/49957006710.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/b10319e4f3ee4bd57f38ecb2219b1e99/26019003561.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/28220891045.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/64cd63412c315cbfbfb96a1983323795/rititabivigononalor.pdfIn PDF document text
    • http://cezanart.com/userfiles/file/30522741460.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607751cde28e0---gewezasajolumol.pdfIn PDF document text
    • http://bluestandard.pl/ckfinder/userfiles/files/karefirop.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/92930458859.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607866412d26d---9605099131.pdfIn PDF document text
    • https://petek.biz/resimler/files/kekutupulufuxesoz.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/ce7b2e135da4bc90fa60132bb9308a95/66707064958.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/14813471181.pdfIn PDF document text
    • http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/63960410928.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/595d25444134acdd09dd4c0c5a78f56b/73506536869.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/lunob.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/bapofaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=how+to+claim+a+winning+lottery+ticket+in+californiaPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF540 17488 bytes
SHA-256: 4a396d33e8cf48015c293021642e57a2ff233e2344be7aa6b168cb41c06e4534
font_01_sfnt_off00012328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12328 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B3F 10796 bytes
SHA-256: 061311e37f3396a228eff299e56bdf78a8a0df8f749f087088c39fb23f330aa6