Malicious PDF — malware analysis report

Static analysis result for SHA-256 0278cd139a2083f4…

MALICIOUS

PDF

609.2 KB Created: 2021-07-24 07:27:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: ab2b4bd9aba96d568f5314683d5f86d7 SHA-1: 22a0f23740bb7e30fd677bfb9b4462a183341747 SHA-256: 0278cd139a2083f483e57f5d5c4bd1808ac681bf52892578c5481a05b33bf750
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a callback phishing or tech-support scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. Multiple URLs pointing to potentially compromised WordPress upload directories were extracted, suggesting a mechanism for hosting malicious content. Although no scripts were directly extracted, the presence of embedded URLs and the overall structure point towards a phishing attempt designed to trick users into initiating contact with the attackers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5241

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://fw-simple.com/uploads/files/pelegolonesobipame.pdf In PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16075ee4a425ca---99104801284.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab53195de9---sadikari.pdfIn PDF document text
    • http://ulleungroadtour.com/FileData/ckfinder/files/20210707_3EF7B7A12AE12570.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/sitadokunu.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ca31d3129---27432660049.pdfIn PDF document text
    • https://markmont.eu/editor_uploads/system/files/xelogerukoge.pdfIn PDF document text
    • http://hanasushipickup.com/uploads/files/21501023225.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607066c3d50a2---menufisizuwozi.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/waduvujolofixikomagulugow.pdfIn PDF document text
    • http://mariancozma.com/_user/file/21478954023.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/af11e9b97403ebab61604fa607fc296f/21325459281.pdfIn PDF document text
    • https://bonacorsi.it/file/22102399626.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/1b9148a3c6c8b00ea46006465bc8221c/20234648895.pdfIn PDF document text
    • https://superpart.com/files/84008593566.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/a7b369a6e8910ae5413fb5541a589868/kimaxabogusugejomizowofav.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/2b3d0fa6088cc5341f4eced174e23f3f/vudazatadubusa.pdfIn PDF document text
    • http://ghioroiu.ro/sites/default/files/file/fanavudaxepamezagepaxejam.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/39933547597.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160acc773a5b80---37586542961.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/21301874399.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e763b9b7f---tufupuxunejimirefi.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/c650fa96331c1a6e934ad2171ea7f947/wupus.pdfIn PDF document text
    • http://planetamama.ru/files/file/xuvegujakirenidelaful.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/3f36c9d974bb6c7e44ac8fe31bd88c29/45275475481.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=class+setups+calamity+terrariaPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0008cfdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CFDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0008e7f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E7F7 4164 bytes
SHA-256: 234321c63dcc2b2a528bef5ec5558b56ebe920b39fa1dde4d505e6c64b77e695
font_02_sfnt_off0008f880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F880 10556 bytes
SHA-256: f3323e4f6fb6354f2cd713162be7ec08f9b9cf1f8d2d4c94e55cd335f1e774d6
font_03_sfnt_off000910a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x910A7 17464 bytes
SHA-256: 57cad0e0a2c06441d4577ea7ad5ad0893fa30ed01db485c0cd76286ff22e56e2
font_04_sfnt_off00092aa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92AA7 28316 bytes
SHA-256: 7c40735564b87ed87d1899bd54df9cb77b8355b6f3f997d74e32225abb69b3a1

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