Malicious PDF — malware analysis report

Static analysis result for SHA-256 f114dbcb42ec0bed…

MALICIOUS

PDF

80.3 KB Created: 2021-09-05 14:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9ef21693e578e4718a7c8c495f51ba51 SHA-1: 2542bfb0d14af8fbb0612dec326800b0d500fca1 SHA-256: f114dbcb42ec0bedda754b66781a172e0c708a540137ff7a98d7ecc1480aa0d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories. These links likely serve to redirect users to malicious sites, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/a855eb515857a30b0c80a3c8363d3cd7/korujoferuzo.pdf In PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/685a3126d072c5625610605684868d00/pemozen.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/cppa1mr8tk5de6l8esh8b1hlkh/58833048353.pdfIn PDF document text
    • https://southwestlooms.com/admin/userfiles/files/9136136382.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/cb04306b18a8b299fd9173e3740f07b3/sorolikikoxudawesuduzedow.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/rivanejirewinade.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/10639657389.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/terebopexifuvejudurinal.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/15423955322.pdfIn PDF document text
    • https://edenestates.com/ckfinder/userfiles/files/rexigumuni.pdfIn PDF document text
    • https://hoatuoi360.vn/uploads/files/sebajafow.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/51407913898.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/40876508791.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba8337daf1---77150838146.pdfIn PDF document text
    • http://uts.edu.co/portal/app/ckfinder/userfiles/files/jotuxugegojabugafogebaz.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/e71014a2b882ff9d3c236cfd744f0731/gejalizonatu.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16097829c0a5d5---zaxepisosogebifuzemirawe.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/6ccb2cd29a6d0a6c902aa0e880f6b507/84982873111.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610306125ea56---fosovitinamef.pdfIn PDF document text
    • http://tehnicgaz.eu/files/file/pavulunagomemagimawob.pdfIn PDF document text
    • http://ydyb.com/filespath/files/20210826053218.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/8efdc481e0b7539533343909211fd623/wovumo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=turkish+menu+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_off0000d4f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED03 18144 bytes
SHA-256: 3b7e8adf712ff2378fd30cdc33e2ca9810ce5cd2a0af02838bad55f039772e48
font_02_sfnt_off00011c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C29 10492 bytes
SHA-256: 5c7616f3b6d5f1ae24df1272a71f080325603d6c0e068e8e29bd64d94f1bead8

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