Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9274c3c073caa0d…

MALICIOUS

PDF

83.2 KB Created: 2021-08-26 00:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: f9f56c896124be1c85a02150502d6ee1 SHA-1: 3ca71fa3dea81d864f001c8925c8cb92589a7afd SHA-256: e9274c3c073caa0d0a07b9f807ab5a3a6dc0d824118f1dbbe0573efb6e307cca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file functions as a link farm, directing users to multiple external URLs hosted on compromised WordPress sites. The primary goal appears to be to lead users to malicious content or further stages of an attack. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/b25cb63570c836e00ac619da552daf45/64968775878.pdf In PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092dee10a4a8---96812866702.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/83114725729.pdfIn PDF document text
    • http://studioaeditecne.it/userfiles/file/71727336778.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/ruwozozibizuxumudovuxax.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16083c2278ed40---fozufagogego.pdfIn PDF document text
    • http://copingconversations.com/userfiles/file/60777174305.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/xanonuwuxobarim.pdfIn PDF document text
    • http://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/13265686557.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a32bf93c2ca---56028950759.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/e244e93bf02c32584daee6b86284409e/38451533670.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/5a52e234f13f138c3fb0baf4c6856600/gesikunukuj.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/7bb235d738381fb708da363c2e58cb1c/vijivuxubarutaxij.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/verajukalotipim.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079a6661cdac---vujiva.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/lateluwatime.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/24923917775.pdfIn PDF document text
    • http://devitohomesorlando.com/userfiles/files/94135860812.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/a540603cc6f153640bbf5123ecc5d5dc/golorinajib.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/54169145789.pdfIn PDF document text
    • http://koyomisushi.com/uploads/files/48133867969.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc2fc74bf4---8657936822.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/fae6d9844efffeb4718a2bbb9e1413ff/68634018300.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=pert+calculation+example+pdfPDF 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_off0000e1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FB 16896 bytes
SHA-256: 301dc80e496debff29a03be2486a3b50bce01de97e108544c84e224b38471e6b
font_01_sfnt_off00010e47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E47 10816 bytes
SHA-256: 4394e2e4fc36639d2a64d7387bd193392fc1f2c5ad063f0423eadd42f312fbaa
font_02_sfnt_off00012736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12736 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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