Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a5d075343162b63…

MALICIOUS

PDF

82.8 KB Created: 2021-08-30 20:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 31e3a5029b19d841b436cdc97aaca763 SHA-1: 47b8982f93aabf4977a8cbfbf1f94eeee0443b05 SHA-256: 2a5d075343162b63ad8e91d8384987a8b3a891288de07cd428e542a36f7e7ec0
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many pointing to compromised WordPress sites or disposable hosting, characteristic of a link farm. The primary purpose appears to be redirecting users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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.tramag.pl/upload/file/65279200654.pdf In PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/fugakamujolevuxox.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/c83f0fbf474529096ae1a017fb27bdfc/zutetubawewevusuzur.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/f6ba607a60fa163866814958da75fdbc/xexizovizirugopepet.pdfIn PDF document text
    • https://1snrpaulista.com.br/ckfinder/userfiles/files/zisimotitefi.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607669ad388fa---konigojigojefebelu.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16081794071cfd---tatozamipuvuwutomorosa.pdfIn PDF document text
    • https://podgoricki-klub.me/userfiles/file/wasetuvorugadaja.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/34561498836.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/irreto3f4t48a659rpe32f27e4/zilupaborapugamu.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1587284b8---mijegerewokebevatimawut.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/do6uo5g10qatka010ehcg53e31/93674655617.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079aa2a59634---monenatiwitex.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/db0b54b76f58cf99d3a076ffe7356e7c/67167447686.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/k2bo8dnj4tuum46ts6h64ukanb/67272274794.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e07454a45---96837281769.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/nitomawogukizus.pdfIn PDF document text
    • http://mishor-uvk.com/uploads/files/56249661076.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe60a76e59---83667356812.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9f87eb11c9---67921895513.pdfIn PDF document text
    • https://lukili.ch/UserFiles/files/64643280233.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871b3eb4169---serokogixokebuwivogire.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/f85ec4ec11d62f03201ca9da6f7cdea0/fafujunazurav.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/6539e6a3e3da6652654e0f6df7b42d40/terivexid.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/74641267733.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/c06a0fa657a15faefe1162b61b9fe4b3/magedejopa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=clark+hurth+transmission+service+manualPDF 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://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_off0000e431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE431 16828 bytes
SHA-256: 4275a230b011f8ec684862ed73fe0c0f1f4c009d124b8d464f52bbeeacd7bc07
font_01_sfnt_off00010fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FCF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000127e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E6 10784 bytes
SHA-256: 93a0f89308eda44f2e1a86b3aa6b5d4a56c1cc94f093b89ba17a72a00ae4cbec

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