Malicious PDF — malware analysis report

Static analysis result for SHA-256 7665d31c3933ee11…

MALICIOUS

PDF

84.1 KB Created: 2021-05-26 03:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 63538b722529c752a4f450dc1344b654 SHA-1: d142923bebc651b048662f23e8abed27251b0ec5 SHA-256: 7665d31c3933ee1167cdc2265652e1f26c77c34279523e0b64eaaa0ff6ca8c51
156 Risk Score

Malware Insights

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

This PDF file is detected as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or trojan distribution attempt. The document body, though heavily obfuscated, contains references to 'Peliculas de accion 2018 en español latino completas gratis hd', suggesting a lure for free movie downloads. The numerous embedded URLs point to compromised websites hosting further PDF files, likely part of a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://southtours.com/wp-content/plugins/super-forms/uploads/php/files/40jdcpij78kltlgt1m6f90q0cu/93017801030.pdf In PDF document text
    • http://adance0112.com/upfile/editor/file/44676579857.pdfIn PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/25874404855.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/d3c4bb5a40cea29a2a7765171fdf930e/dowupogutopijuni.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/68419353709.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/4328e25b4405c91c539234f6665fd656/fupizunetu.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/b99bf32c756f1f4b36e12e09814d29e9/7228290304.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16087e4716b40a---97623746443.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/h8hq6sv9hg83qgssc1r50sbb3d/nukubonodexixipeni.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/3v9fdgh32ccjfnos1c9vdqqo18/buxovusodimefavudanoleziv.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/cd1175089d8060d01346ccebb3d7e752/xedalixo.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/jvm2kappunmh97fsi1k6ca5u07/61291855191.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/b6ef41194e1ab9ce7c18e0f6130c78f3/94150308849.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609464ae46784---60065208373.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0e527a0a0---fepilifidubiwomirigum.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfad8ddf57---76014930426.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160977b3e37b81---xilimixujizusijewig.pdfIn PDF document text
    • http://unsersohn.ch/images/file/rizuzedezu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=peliculas+de+accion+2018+en+espa%25C3%25B1ol+latino+completas+gratis+hdPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E3 6220 bytes
SHA-256: 031f19d8c9dda45893591ec0b669f41aa18754264379bd9d9c3885c174a4c4de
font_01_sfnt_off00011897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11897 12184 bytes
SHA-256: 106c3d4f7ac6132fdaf50ec3071de8302ea93a38244e6ef40c999b0b16f3ead3

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