Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4b13e717dee7469…

MALICIOUS

PDF

83.9 KB Created: 2021-08-17 03:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e5d147e87ddd85fdc6907e16c01a7892 SHA-1: 7fccd0f13929547983e25f4f3ffae1c4340693df SHA-256: f4b13e717dee7469e84a19501b3772d62b76f4afa54074c96c647dfad1513292
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs that point to external sites, some of which are hosted on compromised WordPress installations or disposable domains. The presence of these links suggests an intent to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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://crewmak.ru/uplcv?utm_term=so%C3%B1ar+q+se+te+caen+los+dientes+y+muelas PDF link annotation
    • http://www.oomedia.com.tw/ckfinder/userfiles/files/20126310946.pdfIn PDF document text
    • https://akemi.ro/hirek/file/gixupiwunuvadaperi.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/8gr81ufvro50fqlmo0gb77n2kf/pugoxepirazasu.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1611afa1b75e9b---fatugobajerebe.pdfIn PDF document text
    • http://www.rafaellucenaehijos.com/ckfinder/userfiles/files/70520291292.pdfIn PDF document text
    • https://12tiga.com/contents//files/maxososejeradipenu.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/5in9qgs9012bulhmf3vlveenn0/bazoguwuviv.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607c147bbf53b---kuxubanuwemukazoxugubawi.pdfIn PDF document text
    • http://integrotech.com/zdjecia/file/pazipuvizakuxot.pdfIn PDF document text
    • http://01host.ru/userfiles/files/selurexapuroxowapat.pdfIn PDF document text
    • https://butchercurnow.com/img/shop//contents/42882385431.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/lopemumofitafu.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/valutovapugopufimaja.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/90628c3d353d7648ad0a3e96792eb6f8/97518245541.pdfIn PDF document text
    • http://tw-tms.com/uploadpic/xw/files/84809560733.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/23lrkek8gj2rltc76gvkj94cfj/19127478796.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/labedufalef.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/vebufosudevalaf.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/kinibizipoziga.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/21978366179.pdfIn PDF document text
    • http://headlinesdinerla.com/uploads/files/wepebitorozilarop.pdfIn PDF document text
    • https://suativisamsungtaihanoi.net/upload/files/jekuxovitusezobaronar.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/budewumola.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/59258840839.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/3474415286.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/23e0981e54f194ba33efd448a23c339a/70199758882.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_off0000e1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C0 11172 bytes
SHA-256: 73fe2a283fe3d65b9cb9ab8067fb681ed60af77f3260f2d4aeb530532c1cb142
font_01_sfnt_off0000fb6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6A 16904 bytes
SHA-256: 366271ea9eb154ab9d7d2a1475756508da06c300cfa2b5513dfdf0b570ea1086
font_02_sfnt_off000125de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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