Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc2ef70339d4d0b9…

MALICIOUS

PDF

70.8 KB Created: 2021-09-26 06:36:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 0bccf514f7220e74339011b179558714 SHA-1: cc05fed4441958db8275094f18bf87effadf74e9 SHA-256: fc2ef70339d4d0b95a46d95d696ffdf06320ec63b19968f9809501189a9f090d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains an embedded JavaScript stream and numerous URLs, many of which are part of a link farm hosted on disposable domains or compromised CMS uploads. The embedded JavaScript likely facilitates the redirection or download of further malicious content, contributing to a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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://ctcitsupport.com/media/files/labozow.pdf In PDF document text
    • http://thrifty-uy.com/files/others/98965606043.pdfIn PDF document text
    • http://b40555.handyfriendship.com/upload/files/kusemetevagalobuxem.pdfIn PDF document text
    • http://marmaraisg.com/images_upload/files/84068257202.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/e9s31cee9lnfdaiill6ib961qn/dazekujawelapafo.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/81322221902.pdfIn PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/dewowakokuletegi.pdfIn PDF document text
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gelukowigalukeja.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/norojuwoxevomipifemoluk.pdfIn PDF document text
    • https://mavachhaiphong.com/upload/files/71139985467.pdfIn PDF document text
    • http://fuku-zou.com/userfiles/file/sarebebumoli.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613d5fbe4155f---84497969676.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/161469024f2e9f---xabugisidonobujekujogomix.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/mesodalox.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161305a7259755---zidiko.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/winegijarijize.pdfIn PDF document text
    • http://balcimimarlik.com/resimler/files/legifaku.pdfIn PDF document text
    • https://www.karelo.com/uploads/File/juvet.pdfIn PDF document text
    • http://ageofwonders.buka.ru/sadm_files/vonevewu.pdfIn PDF document text
    • https://atputasbaze.lv/images/userfiles/files/lokagi.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/16494021138.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/0423f81c8e7e7b4efe2b4a2cf300d47e/todusiporavaselixax.pdfIn PDF document text
    • http://sky1981.com/asset/uploads/files/kidekipoxixuguwosotolise.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/41197954152.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/67965039123.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/161458857d5cba---78553630109.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/9e98bc16ad300a437a4da80f5df077f2/64148192523.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=dls+2020+download+apkPDF 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_off0000b5f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5F9 15468 bytes
SHA-256: 3de70a15bba87285bb3730cd5b6e05987085dcbda116b098e47cfcb42e653527
font_01_sfnt_off0000dd5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF571 10384 bytes
SHA-256: 5a60aee7e7c571571bc7fb75838362e4306257f4a5e88d666748449eaefd97d9

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