Malicious PDF — malware analysis report

Static analysis result for SHA-256 3406c14d5787d753…

MALICIOUS

PDF

90.4 KB Created: 2021-07-30 04:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: e9a67178dcca0ab236794debd562b666 SHA-1: 009bfd780ffe849b93c9b55f8cec61ffa2112164 SHA-256: 3406c14d5787d753378c22c1bbddcc5c2cd4a516d5e4e76165b060e336d72124
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, embedding numerous URLs that point to compromised CMS upload storage and disposable hosting. These links are likely used to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://oniceh.ru/uplcv?utm_term=les+sims+4+mobile+mod+apk PDF link annotation
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d90b7e21569---daxivivu.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ee261739d4f---13026567957.pdfIn PDF document text
    • http://flexa.cz/docs/file/48682566596.pdfIn PDF document text
    • http://uamarkets.com/images/file/sozaburufotamuge.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c908f5ca8f8---vevexakosijimonogenaz.pdfIn PDF document text
    • http://kamnitikamini.si/upload/files/xanowujibavajere.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/1qpi28oftrqhhsprp7d5lokkt2/24750317879.pdfIn PDF document text
    • http://synowka.pl/galeria/file/7216154700.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e923dce67---fezavepagogejikem.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/34e34008cc0659680cf7eecc0a882193/fukaj.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/kekuzuvejinuxasus.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/505f5264d575692151f9611eefe6001b/lenevomisus.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607771d5d1035---50501758765.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4c81cf8a5---66541197853.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/048e2bdfa970783ddc2d1e1042995a6e/viduro.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/15805998553.pdfIn PDF document text
    • http://usarsenal.it/userfiles/files/xunerevolodaxobis.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/57d9d79ac638009ac42bbe3bc7d9f2b2/warilona.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/winisavuj.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160afefc46958e---zodiwelobunegupobewer.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/mhajf96n1k76vm844uvrri6e71/wadudizutusasegenur.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afde3dba86e---62266545005.pdfIn PDF document text
    • http://jghsclass75.com/clients/f/f3/f322050927ea28328664fd088939ffaa/File/55370166779.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/0bc274a171d20d2a17db73110106ec8e/lekexalapaxutosufetesad.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/najivaw.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10669 2932 bytes
SHA-256: c68c8f524de06873eef8e8cf15fb446a59655f326e754ce41704fee4fa6dacaa
font_02_sfnt_off000112b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B1 10516 bytes
SHA-256: 1b1da93e7672d34c59dfa55b431120695fe92ee486a435a9b8d5304160a8ca3a
font_03_sfnt_off00012a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6D 19932 bytes
SHA-256: 366b540cd9d8482c939e09aafcfe8ebea27712c87f060af6f89112c779de4936

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