Malicious PDF — malware analysis report

Static analysis result for SHA-256 268beff6ef51d6be…

MALICIOUS

PDF

84.3 KB Created: 2021-07-02 10:51:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0e2d3ebecb7cdce615a7934de2845b11 SHA-1: 9bb2e2b8ad22a3935e3c4b32acca38c43d797ae7 SHA-256: 268beff6ef51d6be2a1a20de2b2b9a7e5c478813f51296a811fcb433d6a512bd
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that form a link farm, likely intended to redirect users to phishing sites or download further malware. The presence of compromised CMS upload links suggests a tactic to host malicious content on seemingly legitimate but compromised websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://pistant.ru/uplcv?utm_term=the+order+of+the+daughters+of+the+king
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e540eb0d0a---kobizoxorelevobenurifojal.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/e13112e77ddda7cbb5a0b13801af9403/61065218421.pdf
    • http://www.allatpatikapecs.hu/images/file/waronal.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4315a9529---dufexunudelasupa.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608db4853bcde---latovizo.pdf
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/mumipamokebixes.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed547552d0---70170450897.pdf
    • http://guojingmall.com/userfiles/file///97988785582.pdf
    • https://hzautomatisering.nl/userfiles/file/tukabavebuzukovogawuzalu.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/t5nqh8b2eo9q72o0o0far3lj0u/dedodorugufegojuxuvukika.pdf
    • http://dokumsuzgec.com/userfiles/files/tigezunaxuzamiwexibefu.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f60ad6f287---botog.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8d3b0ee7d---luterimupenos.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609bbc8b4ef25---vadozawolixe.pdf
    • https://atraba-holding.com/userfiles/file/18586648635.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d0c6c5f1b---kosagokutorulore.pdf
    • http://mutitar.com/user_img/files/wopigujudanorifefunulod.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f6990b8e7---28835428116.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160aef97370eda---poxujepivixebak.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160702d13756b3---72795638413.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8f28a3117---17971457276.pdf
    • https://lesfeesdelhetre.fr/upload/files/sikazeroj.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16086d673a7704---93404216237.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160ad93557beec---28846778153.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_off0000e324.bin
7ce32b082f93b40674d9df37742c64a3e99ae2a36a68fc0dc023f76bba064fb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE324 17668 bytes
font_01_sfnt_off00011189.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11189 16792 bytes
font_02_sfnt_off000129a0.bin
5f89ac4429c6bea54c9de7300bdabe4eb259b030c9a657cc1b34719e5a71d47e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129A0 10740 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.