Malicious PDF — malware analysis report

Static analysis result for SHA-256 533be0c1efdcb491…

MALICIOUS

PDF

70.2 KB Created: 2021-10-02 21:17:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 69d5de1f09e1b507e521fe4418cec910 SHA-1: f5451f3ecf183a3c1f74f54571a3acf5c5720992 SHA-256: 533be0c1efdcb4919591e56d6b6322fe921940d3ac5a289ccc61218abb4d8c75
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories. These links likely serve as redirects to malicious or phishing content, aiming to deceive users into downloading further malware or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a92fcd5eb9---42581489400.pdf In PDF document text
    • http://yuanhebiotech.com/upload/files/61830326310.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/jagavazuwolulum.pdfIn PDF document text
    • http://gospelpour100voix.com/fichiers/newsletter/file/60733315867.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/68205116320.pdfIn PDF document text
    • https://rosettes.it/userfiles/file/femuwebezawu.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/1b3fe72038751a373b1fb2ebca72cd26/manafulobuxukotomo.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/s8ibv3213o11gi5706coo8bpr6/lubatikedojesuxude.pdfIn PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/tufutifapabo.pdfIn PDF document text
    • http://chochosanencino.com/uploads/files/56602285625.pdfIn PDF document text
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/35454885397.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/lipewe.pdfIn PDF document text
    • https://tckontrola.hr/files/85479925805.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16151a37dd24fa---52366827657.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/161587a3555706---fafokajaginogapas.pdfIn PDF document text
    • https://prestinieurope.ch/userfiles/files/kazabonotisujowadopap.pdfIn PDF document text
    • http://manegedebuitenwijck.nl/uploads/file/43673230462.pdfIn PDF document text
    • http://dpnovelty.com/upload/files/pozizeka.pdfIn PDF document text
    • http://teedinmaesai.com/user_img/file/55895745866.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613afd5492fe7---gazelokofarikinedamonebis.pdfIn PDF document text
    • http://goref.ru/files/file/13761034060.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613dde8da5f16---37182020381.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/mimosid.pdfIn PDF document text
    • http://xn--80aejmo0alc.xn--p1ai/ckfinder/userfiles/files/tosepawavepurisodipo.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/12434166042.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=sports+card+livePDF 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_off0000b4da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4DA 10544 bytes
SHA-256: 06a46cd561589fbfcecd5bc4c86ef2f8e99e9de59849598ad05d7f7c595e8707
font_01_sfnt_off0000cd00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD00 15184 bytes
SHA-256: 9cc2a7929b046869bdbe31f89c6e6ce5f29bcf117dd3fbfd82cfad8115f7892c
font_02_sfnt_off0000f35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1