Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb4be697aeed08d3…

MALICIOUS

PDF

89.7 KB Created: 2021-07-04 18:17:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0154feccc6fe8a64c30afbd7e3cb0c25 SHA-1: 9e686f450da984e0e25a26f5cedf7cd3bb549d11 SHA-256: eb4be697aeed08d31a36cedbd63e4d3eeb7a26f3023f674f3c093678ac5069d0
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress upload directories, suggesting it's used to host or distribute malicious content. The presence of multiple unknown URLs further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/b6de7616df30a5f79255412baee619fe/laxis.pdf In PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160725fe529505---paxibadip.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/duvadilemapadoju.pdfIn PDF document text
    • https://hpsoft.shop/upload/files/73224738095.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf51a641d3---bufiwuveziresuj.pdfIn PDF document text
    • http://china-zub.ru/userfiles/file/nimuruselo.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2134b57cf---xozitafefova.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5dd6e97455---jusufinefodopagej.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/17426470558.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/19d8d8af557ddfbd5a5909deb37eb488/17133029395.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160aac929df08f---bamigaro.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/krvsb2cjebn9easbmf8s8dr9jq/kuguvuguwerisidefogetezo.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c4308fe59---wixefifodejep.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/4b017c4549c12a36d4296fa4a79c9b84/fifabimetisita.pdfIn PDF document text
    • http://saiprogetti.net/userfiles/files/bugawarobizinol.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/tozezadanijo.pdfIn PDF document text
    • http://kudusde.org/resimler/files/gekoxozitelitogamor.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/tabidovaxowirev.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608832c8eb1d4---61315390194.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160d62a78245d7---76048971783.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8550a9839---16906682577.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16094e1e874c28---9157156683.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086bfd3f17b6---jukijorimoxitifelafopafek.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/poniwad.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e461a394ec---lojatemoresugo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=the+blood+moon+2020PDF 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_off0000fb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9C 18692 bytes
SHA-256: f4a15c033be50f04756ef7e3ae809e0eb72164e313b2f909efc00771ba9e8aa2
font_01_sfnt_off00012b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14346 10236 bytes
SHA-256: e22deb88909ead3c1374488e946b91f02a2462c2d5a44609b78e2cf7de0407b6

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