Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cdf4add904ad3a6…

MALICIOUS

PDF

82.6 KB Created: 2021-08-28 05:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 696e76f25cb016357a67f5885b71c583 SHA-1: 464750a76fa00853e76f7c4f7eda8d5bc3afa3c9 SHA-256: 2cdf4add904ad3a6118fc4ecedeb5ba66c455d66654de7edab5d885e37c55411
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous distinct hosts, many of which are compromised WordPress upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware download sites. The presence of multiple PDF link farm heuristics confirms the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://fioredda.com/userfiles/files/vamasomivojovekotiboto.pdf In PDF document text
    • http://sosnovgeo.ru/userfiles/file/74373361029.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/binopizubu.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16099b57dddb55---95804871917.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/k00u06gm6t24ms698c3l18e3l3/58631955145.pdfIn PDF document text
    • http://wedding-ideas.ru/ckfinder/userfiles/files/rorawemavoke.pdfIn PDF document text
    • https://biothiennam.com/media/ftp/file/jagomamuwakofekedujiwajid.pdfIn PDF document text
    • https://effetre.biz/file/kanug.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/bffd9140c476e41e51537f30b4b36588/xawuzupudoveduzuxabu.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/40677178833.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/gosezupilojegovegotike.pdfIn PDF document text
    • http://mqskin.com/luutru/files/wovutetewafomowabaf.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c542cec3d---60693477564.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///6015920450.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e198cd1e3b---77133557761.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/kd8fb9fb7v2kkjv6frv45p7qqe/68703801054.pdfIn PDF document text
    • http://akbarestate.com/survey/userfiles/files/jufukowemokezemowiraj.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e776639425---dozipafezenenegox.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/33420990778.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c2ed23ac6---welozewatuga.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/99160130675.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ff5726be6---76837662619.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16081230f4ad38---65155799165.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67f4d71850---komajubabuvejojidazigon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+draw+a+black+personPDF 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_off0000d9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E6 18812 bytes
SHA-256: db2f5380986a7ef008a7723a17d0b3626eacb1ad39b0265143d128021c9c9a26
font_02_sfnt_off0001233a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1233A 10724 bytes
SHA-256: 9e6411ce1843cb039c3424a087b30b5081e28a1576a063664b571417dd808f80

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