Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f906d6a7fcde27a…

MALICIOUS

PDF

76.0 KB Created: 2021-09-05 05:23:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 98417917b58a932ea4b36aaaa422aee3 SHA-1: dd3248a255fdb07a791cac3b19c9800222194db7 SHA-256: 0f906d6a7fcde27abfd7a5cff0f6a9df81993c25b6d4149096b90012f3daaf46
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, which is a common technique for initiating malicious actions. It also features a large number of external links, many pointing to compromised or disposable hosting, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ludifrance.fr/userfiles/file/7469546443.pdf In PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/fotamafuvipu.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/hmegvbkiqg93iq27qi7ljd5b5n/segebogokatizozanasubegep.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607348735ca17---84689681902.pdfIn PDF document text
    • https://grandhotelushba.com/userfiles/file/44807229188.pdfIn PDF document text
    • http://vaynhe.com/upload/files/126412316.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7b127f1c4---wopirez.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160762239f0d35---nawojukegutenolisurugawox.pdfIn PDF document text
    • http://qdxqw.com/uploadfile/file/44571942260.pdfIn PDF document text
    • https://preciseenergygroup.com/media/metabunuketezuzukirowo.pdfIn PDF document text
    • http://italiancousins.net/clients/5/54/54f3d33123424807706abe9154268524/File/kamenelokunaroguburi.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/47694523736.pdfIn PDF document text
    • https://www.santaterezinha.com.br/js/ckfinder/userfiles/files/gobokalonevagilub.pdfIn PDF document text
    • http://uceng.net/_UploadFile/Images/file/34225301753.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f9bad104d6b---koris.pdfIn PDF document text
    • https://codecs.ro/images/file/xadudetor.pdfIn PDF document text
    • http://cafemsoffice.com/userfiles/files/dabimivo.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/da9c8e5d26d32b9a663b13ff8791fdec/bozerejojajuf.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a31b5e0b962---rotajuzimopisepekaruxabop.pdfIn PDF document text
    • https://cutandcolorparrucchieri.it/file/xedikeromafega.pdfIn PDF document text
    • https://club-sports.net/uploads/products/files/zowemovisafifu.pdfIn PDF document text
    • http://ladakhtripmaker.com/userfiles/files/53435809977.pdfIn PDF document text
    • http://veszpremlizards.hu/_user/file/56506340231.pdfIn PDF document text
    • http://yuc-fac.com/uploadfiles/20210810044425.pdfIn PDF document text
    • http://technimexvn.com/images/ckeditor/files/61900345539.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=identifying+verbs+in+a+paragraph+worksheet+pdfPDF 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_off0000c22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC22B 11180 bytes
SHA-256: 4fbd04f5a604f98062d23e952aa5699011018d0236915e07fa672cbf411aec69
font_01_sfnt_off0000dbed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FF 17856 bytes
SHA-256: 6f527c362e06368357c3e748fc4f35ad80dde360e9453875609070b5037619c0

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