Malicious PDF — malware analysis report

Static analysis result for SHA-256 59d5ee8895326648…

MALICIOUS

PDF

121.7 KB Created: 2021-08-02 09:41:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9454dcee713760fdd3ce855a5bbb0607 SHA-1: 538eafeca91d6251185bfc07577a8ced59d607a0 SHA-256: 59d5ee88953266480c52a109082169dc541b2bcad75a95b1f5d0ab41800d04e3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, a common tactic for distributing malicious files. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a method used to bypass gateway scanning. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, but the overall pattern suggests a phishing lure for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/6e40ea5dec5204fe4131e1047a064cd0/sejigugasuzolilarewobatuz.pdf In PDF document text
    • https://mariellatriolo.it/public/file/sikopin.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16093c0f12a867---57346428217.pdfIn PDF document text
    • https://jasz-pap.hu/UserFiles/file/19981925664.pdfIn PDF document text
    • https://dycmc.com/DATA/upload/files/202106160119491873.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/rapasajujovagukozazoju.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/r98ngms7i0i8mpir9dlsf2rc0n/56622869672.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609cebeeae66d---gozelumasaguzutu.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba89e257ce4---sovejiwotedemofikapa.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708d4f150d0---zerogitugekefo.pdfIn PDF document text
    • https://agatanorek.com/files/file/45190859578.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c904a0393af---30196871269.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/rebutujirusikir.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/8764a9c706fc21cd88c258a6848ff88e/33786804736.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e26b830cd---24078307898.pdfIn PDF document text
    • https://aokman-drive.com/d/files/defuzafazudebur.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vevoruwigubotufuxupet.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/5872687406.pdfIn PDF document text
    • https://susta.vn/userfiles/file/90502703338.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/80d1a9011d0a7b02bf6418740d8378ac/xetexuxukajiwomirixi.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/jinigigoxeb.pdfIn PDF document text
    • http://michianaorchidsociety.org/clients/2/28/2832e32407c795c8d28ffe68102aa18e/File/89242713739.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/13138553111.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=can+i+get+my+phd+in+psychology+onlinePDF 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_off000179b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179B2 17532 bytes
SHA-256: ce6da0d540345f84566e0aa2a9e4e33d377dd327157e643ddea65b23577e584f
font_01_sfnt_off0001a746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A746 11008 bytes
SHA-256: 11dde356eb6ecf0251045de25efaa3a22412cd14fcc1b3dfe05d0c3cef7fbfab
font_02_sfnt_off0001c081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C081 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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