Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d3ae2b1083e0f6…

MALICIOUS

PDF

100.6 KB Created: 2021-06-29 21:38:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 5a183f5c964ec6e1cc12e0a4ba52c775 SHA-1: 61c795aed62eb2a5db30ba1cdebdca46160c7588 SHA-256: 01d3ae2b1083e0f6deaabbe7d68c4cc334990da23ed08a81132132cfd49cfa40
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm pointing to numerous compromised WordPress sites, which in turn host other PDF files. This structure suggests an attempt to distribute malicious content or conduct phishing by leveraging multiple compromised domains. The ML classifier strongly indicated maliciousness, supporting this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9358

Heuristics 5

  • 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://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/d7bb3256aba61b056f0c1a86e58574f2/gogofipemele.pdf In PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/re4ieb78q3e7v1l8021dv4eb1h/74238250992.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/3a74a1b2bb1aa8c5fe97ee47e24e66d3/dezepagekes.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/jelezopepelugikifu.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/9881mhkneromfdtumofjjhoa04/44575100177.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16097cca39f10f---34457994838.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/jafupuliputekiburoxuxu.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16082fa62e2272---85170429135.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/pv7uqrab6tam24qcu8u4qmoe5m/pawegukav.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bad03381989---butojimilewu.pdfIn PDF document text
    • https://stegopackaging.com/wp-content/plugins/super-forms/uploads/php/files/sf22d9i66nhcl9l59d4flicbk9/pibubaxanebekaje.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/d87b50b6104d33e81abeab206a0037f8/14613594682.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfb6a9197fb---47636140339.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/gltd2hma0nb25a9votoodf11k2/67814793364.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16092f2c0ec16a---70065388001.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/pkj9akllrie8dg0tbc9qvb1bn1/jizarad.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/zigexafuxileteguvezasijim.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/25009d68f8dd38803019e9b4e97e5a06/furamiwivip.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/entuea1h9usa777sacvv91fgpe/93291739152.pdfIn PDF document text
    • http://www.malagatour.es/ckfinder/userfiles/files/39716717788.pdfIn PDF document text
    • https://upbilbao.com/ckfinder/userfiles/files/8696735869.pdfIn PDF document text
    • http://kapli74.ru/upload_picture/82532400864.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608932d73e945---33575822954.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cb2a41a5b3de1a16ba691cc79161361c/59748220871.pdfIn PDF document text
    • http://www.victoriousintl.com/new/resource/files/xotenimabeda.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/9b765a8fe87a4c07581342251b4e5bbb/40709740213.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=gaze+meaning+in+tamilPDF 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_off0000fa9c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFA9C 19288 bytes
SHA-256: 6bba32c98c54ee312bed56cf2ff03db7d0ff39ebfbc6728342f84f81e958e27f
font_00_sfnt_off0000e3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E5 10164 bytes
SHA-256: f72f9d999b590be958df8dfd623060ade780e3bf9b3cbe12ade0349524b1b8ed
font_02_sfnt_off00011b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B27 4012 bytes
SHA-256: c0dd2b4bd9951d9906e745d168367231d86dc3ca56b3c94864a1295e134c643c
font_03_sfnt_off00012a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A48 26448 bytes
SHA-256: f83e7d12e42ccfb80c42644bb5c8e9f66bf1cbd7954ceece484cd94c669557b5
font_04_sfnt_off00016be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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