Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d7717a0629f315b…

MALICIOUS

PDF

79.5 KB Created: 2021-09-05 05:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d57c849ae0ebfc955064d51f24e30422 SHA-1: 00a442464f9a42429b88b4ede0fe187e8121f148 SHA-256: 0d7717a0629f315b2bf0baddaeb05de97d46f974d613fc5b24ab30f05dd18f8c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://crewmak.ru/uplcv?utm_term=rabbit+farming+business+plan+sample+pdf
    • http://www.mmalappeenranta.com/tiedostot/files/64671817938.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/pjdirelg3jscm8fv2j8opgs4eo/83140808250.pdf
    • https://imagebeaute.fr/userfiles/file/99080379491.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/eb68eaf83ddb9efdbb5c9e0be6b6741b/55361396260.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609f22b3e411d---wapalozegabemomivif.pdf
    • http://fandimnarodaku.cz/upload/file/4409214308.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608525bb02ea7---xemelomovabidederifu.pdf
    • https://educhina.mn/editor/files/wozozevivewibir.pdf
    • http://surtek.biz/image/files/20150117_101432.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8bf9825d15---pasiza.pdf
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/9ao77il06kkv1g8jbghma45f74/53798014531.pdf
    • https://lasanisports.com/files/dasosulasokexoniniwox.pdf
    • https://alrukn.co/userfiles/files/xenurazanuk.pdf
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/uguhqg9ppav46snqaq8hodlf0e/50049906032.pdf
    • http://www.pattyn360.com/upload/forum/files/zixatigisas.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16082c6ff8a068---gikininogubi.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/snvjhu0f7bqgfjdnhvbd1sigk4/fejokakoj.pdf
    • http://elsped.hu/files/file/maremalobexurakezadu.pdf
    • http://scard.vn/app/webroot/uploads/files/73642996609.pdf
    • http://smartvoicecom.com/userfiles/jotijawijogox.pdf
    • http://aktifbant.com/resimler/files/rosor.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c87542e73e---lukesovamaduragamoxijexu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1c1.bin
698f45dadf860b91b0228368f57fb5656eb010dda6a9d83209f63787c0cd797d
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C1 11008 bytes
font_01_sfnt_off0000eae2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE2 16792 bytes
font_02_sfnt_off000102f4.bin
177c1030bd50145afeff41954d7e612d545351793f74d7aa5fdb52b159952f78
pdf-font-stream PDF embedded font (sfnt) at offset 0x102F4 17560 bytes