Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ffccb6c9d5889a0…

MALICIOUS

PDF

81.8 KB Created: 2021-09-06 22:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0b7e269b9ca07618a49520b4507d52ae SHA-1: 149b8f8e7f25e39347012afad11c5447f08b558e SHA-256: 0ffccb6c9d5889a0aef1b7bf1d1755e047a3e16de971b47139b03a002fe0d213
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 WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common PDF-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://pistant.ru/uplcv?utm_term=primero+las+damas+guadalupe+loaeza+pdf PDF link annotation
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16075a9835bbe5---fufikutotiwuvagunowaw.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/vurodafutunurusases.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/2607898402.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/kudekorodaz.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/61843742818.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/pamogulijaduv.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083204f28818---vutefapipegoxakugekef.pdfIn PDF document text
    • https://patoman.ro/ckfinder/userfiles/files/77696817270.pdfIn PDF document text
    • http://klinok-saintp.ru/files/jikurimiragosetelil.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/lbtrp2kfqbl6hrfpee2s74tec8/lopalaburowenopit.pdfIn PDF document text
    • http://buyyoutubesubscribers.com/ci/userfiles/files/vodigelur.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7b6ed4da7---93599938532.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/zenavenejilunapinexul.pdfIn PDF document text
    • http://jameshamiltondds.com/clients/6/6c/6cc67b5d90347a591bf4e9c0b97a5143/File/dejevozo.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160d2732cd08be---satikajogum.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/3a38163476b255ed87668e2384506128/gusapemasetevor.pdfIn PDF document text
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/kenesudapem.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/roucnnuev1r743ggp3fl0t3vef/pusogiguwisopi.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607867e2c8c74---74944545710.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ccc6a128e---5373431403.pdfIn PDF document text
    • http://jinyezi.cn/upload/50138059968.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/71470024269.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/bogarub.pdfIn PDF document text
    • http://www.irrv.org/uploads/files/16938840450.pdfIn PDF document text
    • 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_off0000d521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD521 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED38 10800 bytes
SHA-256: d71afe87b3847325014bea1f57faad3569a7b33282fc60295a372c020baf0d9e
font_02_sfnt_off000105e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E5 19304 bytes
SHA-256: 58715eb6347dda3a6ed560c7f973ab1bfcebaf82d35a05fd7f2a956bc18858da

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