Malicious PDF — malware analysis report

Static analysis result for SHA-256 c700645c7cd6f0f2…

MALICIOUS

PDF

106.8 KB Created: 2021-07-19 06:34:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 70eb97800b3154f068c8221f44f20c81 SHA-1: 541f6fb3919e449c6823868f4612944d588fba0b SHA-256: c700645c7cd6f0f2efda5e79e2207579bd55d1739da6357dc158501f3367829d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest a link farm designed to redirect users to potentially harmful content.

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.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/b08f72e9bb9a14525e1bf7d341f7c027/43658457175.pdf In PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/22258668250.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/84665264227.pdfIn PDF document text
    • http://studiorinaldibedin.eu/userfiles/files/77426924079.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/d4832289d6c462f955e3554b0922b3d3/semotuvidojovopa.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/c7505f60a0456bb5da2ffe499f4410d6/wutebodafokulapep.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/30s0nu4u4m7nme04bqbpg94kk3/43138834690.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160763c294a02a---fupojulenokixa.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160898c589f515---62165808679.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/851t1r7p7f0ng0hll0qauaqh5a/88797194354.pdfIn PDF document text
    • http://ezstreetautosales.com/clients/876244/File/40074598544.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/157717bc99a5e63997882e38fce728e9/15206882676.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/79654052388.pdfIn PDF document text
    • http://garderoba.sk/images/_file/47503054527.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/dimazojijibugotosarigo.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/1ebe2eb51972ee5339cc9afeed3b3ca9/7013662871.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160782c092c11e---37201003722.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/lalfbdguukl00c84d8fgk4hb27/dafutiriwete.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/xinibenewobugebidenukimiw.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd18b6fdf8---32576759568.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/s8bla46vgmrgtjj2p4jfj60nvb/jewodapodoxu.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/49149195603.pdfIn PDF document text
    • http://ogbchurch.com/clients/880797/File/fugupilunukusawupuvegeg.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/b28c167d4ae108b9b054e55a345f7a4c/rinibupotikoruk.pdfIn PDF document text
    • http://ourhkg.com/UPFILE/userfiles/files/9967028625.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=substance+painter+to+3ds+max+vrayPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00012647.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12647 20780 bytes
SHA-256: 6de7a9b62f45dd7520f8ebac2d86a208c7eafbb8a705372d7b86925013198c7c
font_00_sfnt_off00010e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14982 11396 bytes
SHA-256: 1424cc4b7675fde05403c9ed417b63f84f6c3eb6d7d359cc2144c0ed7c575739
font_03_sfnt_off00016438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16438 1700 bytes
SHA-256: 15171638d69c9281a983de8a04f8d213e5ed86d33053034f6aa0dd130c4010d8
font_04_sfnt_off00016c4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C4B 17380 bytes
SHA-256: b5890ac91f7a6711d59e0aed101d669486cccd655067fb1e28b9862edc81e624

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