Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2d346de77c018e…

MALICIOUS

PDF

93.2 KB Created: 2021-06-13 01:05:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f7cb7d70293fffa0a6b2b9aa9b6e2426 SHA-1: 34739011e9c69ceafc60b01a8f0a33cff0d15b74 SHA-256: 0a2d346de77c018e4e1b39809fb30585e5c03dfdc17fc710dfc15993a0dce9ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, presenting multiple URLs hosted on compromised WordPress sites, likely to redirect users to malicious content or downloads. The embedded URLs and the heuristic firings suggest an attempt to exploit users through deceptive links, potentially leading to further malware infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • 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://medvor.ru/uplcv?utm_term=happy+birthday+to+you+en+singathuku+song+mp3+download PDF link annotation
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/669b3194203d5e07b785ec85d5892213/9199401040.pdfIn PDF document text
    • http://robalton.es/Albums/images/file/%5C/misugodafekuleke.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607a508d4b1cf---6703177669.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a417bc961---zozapita.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/mtq21g4i899h5ukuo34i9mrdu7/79677471632.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608292a74ef53---sofefosafuvikojekiw.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7bd95ca465---53200737829.pdfIn PDF document text
    • http://aiaciran.org/cache/fck_files/file/17423314745.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/qitmje3qouao0ks55d1qv9ua1n/41134579989.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9e8cb6acd---jexoromavuzitajax.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16088dd99a6ad5---28208248326.pdfIn PDF document text
    • http://hud101.vn/webroot/img/posts/files/89080785563.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756e2d8fcb4---pepemir.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/2d8b5b51cfb5b79b4f443e5a5161c452/20604707699.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff744a733f---42311364047.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/0b6fd4cb10518d3da1b1ecfdd2c9b054/wedutofojaweluninoranex.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210612_B110F998B23A9EF8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn 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_off0000d85b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85B 5896 bytes
SHA-256: 416f2aac1f936abfa17e5126cd8b14db32c6f9cda30d6c92dfd7702acddcab6e
font_01_sfnt_off0000ec4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4D 2656 bytes
SHA-256: 1620336da6018abf771a3b64a4739dbc5cc5761e5bcfd31f9568e9163b5e6178
font_02_sfnt_off0000f74f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74F 16624 bytes
SHA-256: 573f33cb93a777bc426e30c5e277d1395e817e2e0d9bf8dd024e382d43f8d099
font_03_sfnt_off000128ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128CA 11504 bytes
SHA-256: 606ca86ff2d1ea7ee4146be83ef11c94d9d918c1f4fcc032186831d1859f3154
font_04_sfnt_off00014fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FFF 16500 bytes
SHA-256: 963078a0e5b3eda6e57bc7f8d25a58bf2c83aac17e1db92adde8a8b12a5c9fb9

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