Malicious PDF — malware analysis report

Static analysis result for SHA-256 07575677604d1515…

MALICIOUS

PDF

82.5 KB Created: 2021-09-08 06:51:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 68c9f024f591b8d3b44f85cb9fcd3341 SHA-1: 07bd9f3db218d247ca0df1ec054953a772b93949 SHA-256: 07575677604d15155c6925421a09bc3675ecb20dbca073a437c3d9bf130703b9
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicative of a link farm or SEO poisoning attack. ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's high score further support malicious intent. The document's structure suggests it's designed to redirect users to potentially malicious content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607612b65ab61---93793001931.pdf
    • http://yizhu580.com/ckfinder/userfiles/files/77801596197.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/ga70drl7mjbf0icq57p94e2rdk/mezitezoxupusalatu.pdf
    • http://randalljroutson.com/clients/44711/File/29657739638.pdf
    • http://langeline.com/ckeditor/upload/files/zupiwujewejuxeli.pdf
    • http://pharmorgsyn.com/upload/files/37809715304.pdf
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/45279762797.pdf
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/79355460875.pdf
    • http://domplus.su/userfiles/files/57376699614.pdf
    • https://247hvac.ca/fabulous1/uploads/files/76585895184.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/8040b2cf58c72c7bdb937305bf0d8e04/lejolatutulageboji.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/6u3cb7827s00tqrtjbhnag6m7j/rukexikekumuluwaka.pdf
    • http://kirakuramenandsushi.com/uploads/files/vatama.pdf
    • http://istrouma1971.com/clients/9/9b/9b88b062b8d6af44b28e209fcb06d7d5/File/lepefadosivamisule.pdf
    • http://medob.org/SITE/files/editor/file/74311887512.pdf
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/cac9465891d37748c13fce4026bebe5a/lukawurufo.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad939a29ebe---91684715218.pdf
    • http://ukrkarta.ua/fckeditor/userfiles/file/97489680308.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/gbkdfkkvd6qdbgjkkqabqaqgg9/kekikuzedazegas.pdf
    • http://xiaohecollege.com/d/files/54484639371.pdf
    • http://yanartextil.com/firma/files/rorazoto.pdf
    • https://lawweb.info/mycms/admin/userfiles/file/kovorolizefolozuvarelure.pdf
    • https://ovalpolycoats.com/media/jufarolulobasapage.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe88ddecaf---92961479956.pdf
    • https://goooinggroup.com/userfiles/files/20210807_014750.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=worcester+street+map+pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd74.bin
a8e276afe3365a00046cc7c0615316f1183997f89e6dc57088addd574cf22e66
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD74 10532 bytes
font_01_sfnt_off0000f583.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF583 16792 bytes
font_02_sfnt_off00010d95.bin
0ad1c2f1e6fea546830e1be4165d4658300b1c329bbd67a8e6b6b1d2aab32aee
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D95 18368 bytes