Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fc08a30dde60cdb…

MALICIOUS

PDF

189.7 KB Created: 2021-07-17 02:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 91db7f99e9d5b59eac888b1f79d36c3a SHA-1: bcdb19e1391aa699a2595aa93b69c8e2eec908d8 SHA-256: 7fc08a30dde60cdbec2076384737023069c3288008729406717b44d75670e305
156 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous external URIs pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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 http://lapenya.cat/imgjovesnaves/file/xawedisudinum.pdf In PDF document text
    • https://digitaldaya.com/imagenes/file/59604806444.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/ravubekipabibukigeva.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/61748439460.pdfIn PDF document text
    • https://pingthye.com/userfiles/files/mesibufuzabudasafira.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/694483f12116ef78e617ee96658f9b85/81386105040.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16075f66c089eb---35202210286.pdfIn PDF document text
    • http://yuemeism.com/uploadfiles/files/pinafepax.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/39064510754.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/46894736395.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/ce93c19b31b5722428210d02e6d837b1/fexexikidokufojukus.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/58e2fabaa94e48aba41439c537745e19/xipevokefodaxata.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607440c19b6ec---83696614720.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083960b3e885---78081537306.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021052819344373499.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/4942975a8cb8c95ea17714bf789fac2e/xuwumedobora.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076babbb39c1---tixekiponexejesenibi.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/e519f338051c1310a46d4ef486016e8a/43903151899.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16084b56d1f489---22587992710.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/ijj0mmuf6m8ima6jdfkvgrd6a1/pevedazi.pdfIn PDF document text
    • https://lapakunited.com/contents//files/mumak.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/16084896e0b38c---320490324.pdfIn PDF document text
    • http://anhopphat.com/uploads/files/fideze.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/qeupei4ps4t49s0vgragsl6rbd/34361431810.pdfIn PDF document text
    • http://wefocusdesign.com/upload/files/babetovizapilatum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=if+christ+is+with+us+who+can+be+against+usPDF 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_off000272fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x272FB 10848 bytes
SHA-256: 458a580949119a276a93ded60deaa7bd5e25f8c051d7e771d30ee2459d536505
font_01_sfnt_off00028c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28C14 33112 bytes
SHA-256: 3fb6845d686a71b2f4a820688de3a17c87a7b0716bc2f3ba8f182102adb3166f
font_02_sfnt_off0002d0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D0C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1