Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcae395469f66ffb…

MALICIOUS

PDF

111.4 KB Created: 2021-07-04 01:26:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6704d0ec060fb9f045935194d9e8a351 SHA-1: 011e051f31396ab187453e2723c59424e1a28c2a SHA-256: bcae395469f66ffbd69edd8e3750d057c6b89cb37111af3115dfb231e48d13a1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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
  • 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://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b822e044806---76628872907.pdf
    • http://banghetretunhien.com/media/ftp/file/58332568858.pdf
    • http://bakoca.hu/files/file/velogafafaraguxakok.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/clfsnd5lesvrpf642tb6r1f6s4/dazeliveletoxifak.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886f11363f4---ronisamejo.pdf
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/lgs87unn8ullsgnin0j91o4oce/liwilizirifekuzaxopa.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e11b646ae---kakibadezevekevasoj.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/30sa2s1qot939ir7i6l8ts4865/6417446127.pdf
    • http://bwc.lt/i/jadubavubaz.pdf
    • http://phdpecs.hu/userfiles/files/vovimetapirabazute.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba014f27e6e---xubixer.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a07b612b795---sosinujakitutogiwev.pdf
    • https://sce.tw/uploads/files/60c8fa6c22e2a.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/50579b6d78675a18b5a3923c1e1deef7/varokitepuxafalemawivupak.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1dd083102---96426176540.pdf
    • http://asokmontridental.com/userfiles/file/107249059.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160909cd620baa---setewilevositatoxofabimow.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1fc3724710---38448768319.pdf
    • https://africanresearchcenter.com/userfiles/file/xewuweradudolinalixija.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/b18adc79a60f2a718098b13515d3330e/musupakazobobos.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/8f9be4d52096c8f27b1494c376003811/xamepopaku.pdf
    • https://bbu.vn/Images_upload/files/nimepokabaras.pdf
    • http://skrabl.pl/www/rpbd/fck/file/11729228941.pdf
    • https://mbzl-pro.xyz/web/img/podborky/files/rebuzemenevukovam.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dacfab18f8c---8943785953.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=ppt+to+doc
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de77.bin
a15f1dca12b3964ed0b4163de50910bfee53eb8a0c1ebdff34cb5b50b9798be5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE77 17228 bytes
font_01_sfnt_off00010b2e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2E 16792 bytes
font_02_sfnt_off0001233f.bin
a671d37c7b3b889284622d243fc9727f378cc914a66da79eb58e164c6b93b0ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1233F 16076 bytes
font_03_sfnt_off00013859.bin
747693883bcc7aac4cc415cbdd5cc76ec41f3c83b1858a826e7bd548d7385aa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13859 36172 bytes
font_04_sfnt_off00019a4c.bin
aa3ed6a170b3ae847f85645be48b2cf05393df85f687e7dee2afa2e8202d9baa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19A4C 9704 bytes

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