Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd68ccdb2fe2533…

MALICIOUS

PDF

85.6 KB Created: 2021-09-05 07:51:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bdcfcdc68a8d4c7c75b19e1ff148d34c SHA-1: 9c4321151a6fe1f4179f4dcdadca5c830765542b SHA-256: 3cd68ccdb2fe25331724222a8cecc590d63bfd5870c8fedb3ea837e91253ee34
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 for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous URLs, many of which are hosted on compromised CMS upload directories. The primary purpose appears to be directing users to external, potentially malicious content, consistent with phishing or credential harvesting lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a91df2d71---47490303982.pdf In PDF document text
    • http://ahchala.com/img/file/88456342387.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/43d97a8366cb5bb0fdaaa4bd65a39608/48278535205.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/gijemenuwomupif.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/53831516145.pdfIn PDF document text
    • http://studiomarazzi.eu/userfiles/files/45362711245.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b311f2a742d---77044343007.pdfIn PDF document text
    • https://bataretak.com/img/files/file/mibanujanireriz.pdfIn PDF document text
    • http://aiken7050.com/clients/5/51/510ae66c864a6d23552e02d1b5190e2c/File/wezijunepab.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3049013a3---5798822980.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/xidapobikomijadaragubo.pdfIn PDF document text
    • http://tfforming.ru/d/files/72131179312.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/41990613288.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4bf3e954e---4899942984.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d24f17b5e3c---81727472262.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160bf92cf9af16---31784891353.pdfIn PDF document text
    • http://michellesmithscott.com/clients/36670/File/56081343346.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113f34ef335c---kugodeduta.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/kvu8e2hkb1fm43tj2538ev8s3p/10436555029.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca40d12346---mabizezadufusovi.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/gusosomuwut.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/12b30d4219f25d0b461e65f773d09de9/94133904724.pdfIn PDF document text
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/87616165262.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/6221082916.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/wubiparotasoti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=district+court+recruitment+shortlist+2018+pdfPDF 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_off0000e995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE995 17304 bytes
SHA-256: 5c362883b9205e223643cc9100293d02b1f4783310c9d59539a9e36d38b5e9e6
font_01_sfnt_off00011620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11620 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E37 11328 bytes
SHA-256: 76a4999da2884a46a57dcc41e455d95b6ab9185c8671c702389f1b12ea0cbf41