Malicious PDF — malware analysis report

Static analysis result for SHA-256 2620c073c7cd4c8d…

MALICIOUS

PDF

78.0 KB Created: 2021-09-10 17:00:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 769eb175f79fc9e38030039489f2107f SHA-1: 688e25d16bb72ea93df0217b0cee107c6146f71c SHA-256: 2620c073c7cd4c8dda5ed161dbbe1ea6dea93da02832019db7bbcd22549e77ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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=sana+sin+esfuerzo+pdf PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136452a6be98---57049161636.pdfIn PDF document text
    • http://mtreurope.com/ckfinder/userfiles/files/pevinosofab.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/53742784115.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a02072ab18---53119793890.pdfIn PDF document text
    • https://santa.my/images/users/00000000/files/mijopajufu.pdfIn PDF document text
    • https://wheelmartthailand.com/image/upload/File/xitidovujaxitipal.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134f064e46ab---29710845801.pdfIn PDF document text
    • http://puebloexec.com/userfiles/file/93322283183.pdfIn PDF document text
    • https://henseltech.cz/userfiles/file/47862328585.pdfIn PDF document text
    • https://ags-car.60km.com/upload/files/zarexawagizopamiwawulobi.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/33901320267.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/h5nhq5gg2f1qjlvnh6dvfpfma9/8142389789.pdfIn PDF document text
    • http://zhongjiukeji.com/upload_fck/file/2021-9-10/20210910160028120497.pdfIn PDF document text
    • http://gamecoast.by/uploads/files/65530121399.pdfIn PDF document text
    • https://www.parquesanalbertohurtado.cl/ckfinder/userfiles/files/dusulomanogapaloxiwuror.pdfIn PDF document text
    • http://gamecoast.by/uploads/files/24500458061.pdfIn PDF document text
    • http://lizhechem.com/upload/files/nelexixezuvuputerulizuk.pdfIn PDF document text
    • http://sitarofindiamd.com/userfiles/file/45476262952.pdfIn PDF document text
    • https://holcom-wd.holcom.vn/webroot/img/files/punanagukos.pdfIn PDF document text
    • http://jafra-com.at/userfiles/file/kefiremimimizeb.pdfIn PDF document text
    • http://novelinternationalschool.com/ckfinder/userfiles/files/zepamurofulexotatanom.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7DF 19660 bytes
SHA-256: 74153244f93544925389774aaab1e7bb581acfdba69470f882d6c3374ca4d24d
font_01_sfnt_off0000fa5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11273 10580 bytes
SHA-256: 24ce8d7d12d05528a7708e812c4a14ab8cb5154d5417dbb19dd9ef7285af37ed