Malicious PDF — malware analysis report

Static analysis result for SHA-256 794d93be5be66d76…

MALICIOUS

PDF

72.0 KB Created: 2021-07-07 00:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0b4df41eaf03787454771a4814821c77 SHA-1: a44fe05b2cfef2432da036a6c5116774150c56bf SHA-256: 794d93be5be66d76865771595bc38f4c734bf459ea605517d0b359d28815251b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file functions as a link farm, directing users to various compromised websites and disposable domains. The primary goal appears to be to trick users into downloading further malicious PDF files, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6550

Heuristics 5

  • 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
  • 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://classconnbio.com/img-jacson/files/52601698259.pdf In PDF document text
    • http://bmsorganica.com/userfiles/file/ruzimamuxupunejexeguzo.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-06-07/images/files/88278259140.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160722b74b3b73---bolunaraxokikodatetigipu.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2b21161ca---miferefevizozizigokale.pdfIn PDF document text
    • https://marosme.ro/hirek/file/71856146136.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0621e2627---tuxinitebamufesori.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160934f4b2cb96---vujizaze.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16076163034a00---60899802269.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c948f06cbb---gevemor.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/nedinadudifavilipol.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/wetogoxuxuja.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609941d9948b6---96236788986.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/1a762ccb64c631352e9635f6b2cbc7cf/92505235644.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16077270151c58---pizadanow.pdfIn PDF document text
    • http://poiskvod.ru/images/file/jinupivopiwaguwotamewive.pdfIn PDF document text
    • http://duepassidalcentro.it/userfiles/files/gomovu.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606efea368c28---47728995493.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcf0e6c268---82038194697.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/49c8e8ebdcc3f525655e7319aa17fb36/5066053888.pdfIn PDF document text
    • http://cba60.com/clients/6/6c/6c2dd71b6188bc8e8f5adc6209c6f86c/File/vurisimorasod.pdfIn PDF document text
    • https://limmaginebistrot.com/file/8428177358.pdfIn PDF document text
    • https://ttnthailand.com/upload/userfile/files/18642209727.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/47817732996.pdfIn PDF document text
    • https://schlosshotel-murten.ch/userfiles/files/detimurudukutomesis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+install+games+without+adminPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A9 16976 bytes
SHA-256: 230811963551d8947c2af9934e5b243ff0cdd0ac87704bf0e1a6808fe07fc6a2