Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b607479380a7a97…

MALICIOUS

PDF

69.7 KB Created: 2021-09-01 01:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d0f1a08dc709d9f8298dc4ee21738aac SHA-1: 4f53ff1b1364d92d498bd072c1170166b81c6fd5 SHA-256: 6b607479380a7a975c37a307d75ce6f34569d73b53d43a89eb7514bf88157bc4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous external links, many pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The PDF_IMAGE_LURE heuristic indicates it likely presents a full-page image to obscure a clickable action, a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://chcial.ru/uplcv?utm_term=need+for+speed+hot+pursuit+apk+obb PDF link annotation
    • http://novelinternationalschool.com/ckfinder/userfiles/files/83165892877.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ee459831226---59851990616.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/75417753520.pdfIn PDF document text
    • http://gdwtechnology.com/fckeditor/file/9881507363.pdfIn PDF document text
    • https://infotechloyalty.com/bot/ckfinder/uf/files/zoxaladifuxanejaret.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c5cccc2f342---78600720149.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/6aae84f36afc48e6ae07eff673494b53/xowukavorefa.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160a9864c37507---ramuxifemudanoruditure.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d4435543a---powapajasoj.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609a263cb0ed6---66795501217.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/h92fl55lkvlbrdumiucis7d41s/pazalofadutaberososuke.pdfIn PDF document text
    • https://beytarimcilik.com/admin/editor_resim/file/32807490591.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/ee63a582ba387c316841944bcc8d50a2/62959609546.pdfIn PDF document text
    • http://theeultimatenetworker.com/ckfinder/userfiles/files/11390981249.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/e925baad088fdb72fb3ffdafc5451859/48543475256.pdfIn PDF document text
    • https://ketex.com/trcgp/ckfinder/userfiles/files/bilovatodopudik.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/32479683945.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/fb3ef518b995af3c36844f524ccb0bee/23576443220.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf2749123b---68621148509.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2d2d16ada---pumikatapasamo.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/29021247748.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/suwixijom.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/tnnhhg0oemscvbbfv83ph7turp/45225019010.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/b90u5fh0c4e3vt7j8nlgbqe3se/xuwoj.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_off0000b3f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0D 10752 bytes
SHA-256: 2030c4ce6189f3d2fc3c4b8a90af5a70347885ef22e417c1c525ff746c3ddf77
font_02_sfnt_off0000e4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B5 14008 bytes
SHA-256: 90c23df5af44c2adaa327c64f441eafbc7ea55b93c8f1c7af6447b3904b98dd5

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