Malicious PDF — malware analysis report

Static analysis result for SHA-256 27d492c423c5c2a4…

MALICIOUS

PDF

90.7 KB Created: 2021-07-05 08:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7d70e2efb07a98f991ad6c4389e1d822 SHA-1: 61b7d00538e0ef855f496572254dc6edb8453a06 SHA-256: 27d492c423c5c2a4d025f24c645a4223d3c0697fa5ec72f2140a080eb05d9acc
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a lure to enable macros or editing, a common tactic for malware droppers. It also features numerous links to compromised or disposable hosting, suggesting an attempt to distribute further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 7

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/3ff60a2b7996fd4ac2ce0a58997b88b7/farometo.pdf In PDF document text
    • http://eden.pk/mycms/uploadedimages/editorUploadedImages/file/lokusorudejipagedu.pdfIn PDF document text
    • http://songpinhao.com/userfiles/files/tadogarapopudi.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/97552306856.pdfIn PDF document text
    • https://vietfun.com.vn/wp-content/plugins/super-forms/uploads/php/files/ad15ckr1ekhul01jd6g9mkvrh7/xatikunabazigupexovofoji.pdfIn PDF document text
    • https://hsse.cl/files/68345653159.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/a9d91ea44c05a7ca7056d8840efab036/wakivajugoku.pdfIn PDF document text
    • https://numen-wow.com/userfiles/cloud//files/ritikif.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/jogech1f4beir1p8mr78q4qu24/bixebudexizebivabe.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608c34275779b---88205288873.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd1445386c---71370478002.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/hp1m55olugte3eu2r5ojgu6br7/2752975841.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160978532e6204---66483329587.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/eb4f0a68d401581e4111b5fbc34c7f5a/78303351067.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608498864faae---76859908288.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c05496946---61163653096.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/d918536871ef7cd90556d13d5f8a2425/85101494925.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/kasuwunasem.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/gesijonogokuzuze.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/tusigagobigowolag.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/baxolosaxulovotodiv.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16085e43cc57ba---zuliwosaniverudetabero.pdfIn PDF document text
    • http://permianhighschool1970.com/clients/e/ef/efee9fcbc667252fc4b649c8163d3733/File/73186312959.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/8a37308f596c6f5141e274ad92df147e/bizofaxopojovevo.pdfIn PDF document text
    • http://boursemoi.fr/userfiles/file/suliradanufefu.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/22086084355.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/5b0c1735c80321702f9798507d86f303/58081130541.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=excel+examples+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_off0000fe6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6A 17948 bytes
SHA-256: 246badcc166126ad07278c2d87db00e55401b2aab1d0fb482c814e317edb572b
font_01_sfnt_off00012e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E07 10352 bytes
SHA-256: ad2e2127336dc5b0833c91f00cf8a1dcee65435133776bf43a8328c4b0ec1557
font_02_sfnt_off00014570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14570 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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