Malicious PDF — malware analysis report

Static analysis result for SHA-256 8775125f837a1f53…

MALICIOUS

PDF

96.2 KB Created: 2021-07-02 16:15:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: b27cec9db81c69df35b516a12dc0887f SHA-1: cb9655712baaff9860360b3e6efab9a2536c992b SHA-256: 8775125f837a1f5371174b02422bcd55f59628cbc210281e925593dba0d4bf92
164 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to host or redirect to malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nomylo.ru/uplcv?utm_term=sony+icd+p620+driver PDF link annotation
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a70c92769d6---xisobuwu.pdfIn PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/34082100421.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/e4cc7c5c1b6fe409b6784168d99f8b18/satunepugukerokoxufojaso.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/luvasoganumopog.pdfIn PDF document text
    • https://bda.ch/ckfinder/userfiles/files/92139526749.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/395926ec4c178f920eb9f618e1036a81/54646961664.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607256dbaa4c1---73461825909.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/kejilejabulasekarefoxutar.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/c7e078d1d58fcba00a05e9f4979ae6fc/48231816445.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/4697704455.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/46563597802.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608af2f81d7e6---wixajukafi.pdfIn PDF document text
    • http://pneusmarene.it/images/file/73565765931.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aabccc25e57---69309445008.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/9307844856.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9adb174f95---97495839277.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/76a3d3a7f1974b95cbbedd11f5c7dbab/88584049114.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6818b9f6b74c1f486aed5e16d836d7bb/gumibipupadufimaferevefu.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/2882e08e2d2a77361db701f09b49fa7f/68491267823.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/59437964555.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/41fd8b6e8987e91433497d7fcc786ca2/kevametubupomarazimiz.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0287d8acb---43403854283.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608f97fab07f1---lavamixipeti.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/da6c850e65417ff961dbd98604d95c55/28193072563.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_off000112c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C2 10700 bytes
SHA-256: 9471705eebbb3bb612bf2c5364b76abbb76194cc0f1d8acd64db3d6db268872c
font_01_sfnt_off00012b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14387 18368 bytes
SHA-256: 588e447c0dd633852108e70a914daab0665648cc586b6f077daf4c1a18896dc2

Open this report in the interactive analyzer, or submit your own file for analysis.