Malicious PDF — malware analysis report

Static analysis result for SHA-256 b95e23d67ee2a1c2…

MALICIOUS

PDF

134.6 KB Created: 2021-06-25 20:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dcd6d2e6836c9aa600022f5842903f5b SHA-1: 60b4985d691133f474ccc4590cba1a7220a41253 SHA-256: b95e23d67ee2a1c25fba82ee60d68060273e6ea1b0cd9d52c67da48542901a7d
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous links, many pointing to compromised CMS upload directories, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

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://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d171bd8af1---fumozopineramejinabam.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5e029a461---zugezenatenopurelut.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/530tf2regniscavgn505ro3560/24917194401.pdf
    • http://lasfyy.com/uploadfile/file/20210607045258309.pdf
    • http://instant-image.net/UserFiles/Site/File/bepogupoxaxobukaja.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/01p6o68h7e6udraq4g6kkoeq14/jidorozikisoro.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad57364063---99300921613.pdf
    • http://kistours.hu/userfiles/file/tolig.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/a4fb2ab9bbaca53e347809df4c3c30e9/dibawagalinupoverebojiwo.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e25599bfb2---30647372942.pdf
    • http://kochamsushi.pl/UserFiles/file/dolemakazab.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16093e15614b10---bapugodijub.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16070e7712bb12---piben.pdf
    • http://toshiba-center.ru/uploads/files/24129820304.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/5qn8dmk8o27b8unfofjkkjjol6/bijepoxadabujipewa.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f418abad7a---vexojoxuwizovi.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5141dd6b3---wujugiferebaligojip.pdf
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/27112f6f25be8eaeb61e109db675e74a/rurukivijatelib.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/a7cb653f609ed0ba6372f7cd52b8a63a/46945378549.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/8cb0ad5ef872c8e5465e8e3e710c687a/8247185339.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886177a60ce---71475777261.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607031652581f---26352369272.pdf
    • http://datev.hu/ckfinder/userfiles/files/90399212884.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=retroactive+interference+memory
    • 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_off0001af66.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF66 16792 bytes
font_01_sfnt_off0001c77d.bin
42ca76d7f3c23668fe9ff6e46e2b9728feab1a81ce97ba4f98fc6d1d4c868737		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C77D 10508 bytes
font_02_sfnt_off0001df70.bin
71bd6aa03fa9bf5eaef980ff35f8134c37bcb815d8e66e73c97000421c788e07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DF70 17732 bytes

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