Malicious PDF — malware analysis report

Static analysis result for SHA-256 16d0f02fad2411b8…

MALICIOUS

PDF

86.3 KB Created: 2021-08-19 13:29:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c725ab11282d6911f710372bc0950ad8 SHA-1: 0c11b7f9f7acbff611781b48f6c2d09f224df737 SHA-256: 16d0f02fad2411b8d7f1ad1bd534d2a7040314d3f03856de9667d1a4eca7df36
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and link farm heuristics supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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 http://askort.pl/Upload/file/jasivusati.pdf In PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1e1875901---61777901202.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/2tej8op6nuupj8jeeoe9g4gb69/45501610602.pdfIn PDF document text
    • http://gelateriacool.it/userfiles/files/72572894130.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5j3io5eo71p40sugii542g4up1/97801167316.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/30249072527.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/oretkkfg1uhpjr8ul8ikr9avc7/miropojigubuzej.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/12934363489.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210722_680793487ED81E1B.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/88835657810.pdfIn PDF document text
    • http://thechitay.com/uploads/userfiles/file/30841211837.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/mudodusugakokuxutipeguros.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/gixufinegiga.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/46677171909.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/df7a3270584b4de11ee72efe8ca1979f/7964380666.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/xoluvesawusuvex.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca26c768d0---86397884003.pdfIn PDF document text
    • http://td-mg.ru/uploads/files/xuxew.pdfIn PDF document text
    • https://alternativecarrepair.nl/userfiles/file/55599909698.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/giligibivewex.pdfIn PDF document text
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/o52i6iqi17nuk3aq0ld6a5q65r/virebofi.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/76qdshdh8rbo06nbfgto4ae9i0/63831552046.pdfIn PDF document text
    • http://highlandlynxotic.com/clients/7/73/73cf6ae24f8ea70eb1cbac1dff6b0f9e/File/xixekewojapun.pdfIn PDF document text
    • https://mimpiindah168.com/contents//files/22017463845.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/letuzofebara.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/munojajug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=score+hero+hack+unlimited+life+and+money+apkpurePDF 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_off0000ea9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9A 11100 bytes
SHA-256: 60785083b0886eaf0d67b429785b4dd7eaa9a8858cc53e5c392f34d1d194434d
font_01_sfnt_off0001044b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044B 17780 bytes
SHA-256: 5ae4f8140c0689addd544cc9f46d7e52afa1e75f79c3911d6560a72996ea08e1
font_02_sfnt_off0001329a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1329A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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