Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ec8a09af62cd82…

MALICIOUS

PDF

90.4 KB Created: 2021-08-02 21:37:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8d6f5d7066056e85c0b3e6d0cff01234 SHA-1: 68efddd1b6ef0efb4d9dfcc5307b0cfd6f7026b2 SHA-256: f3ec8a09af62cd82efa46afed3a6e13d1b97d29bd1d523094965e272e57c68b3
196 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including ML classification and ClamAV detection. It contains numerous embedded links pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The presence of these links and the overall structure indicate it's likely used as a lure to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160b63945415b1---vudekitekevagifa.pdf In PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/2c7527ab4a1d11f7dadbfa664e2dab18/xoturaw.pdfIn PDF document text
    • http://apcmagon.com/userfiles/fenesanawefokewemudubu.pdfIn PDF document text
    • http://halongbaycruises.org/upload/files/kapewewowavonufiku.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0e535b7d8---18307435578.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/bueaaq9dl8oduoggicc65mlusi/jerobazafafilotin.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/26486556852.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/875677b6c84aa411ab74c23e244451a7/75440859773.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed892dce385---44640802086.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/witisijelatusogaje.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087a8205bde6---jutoxigagiligejapov.pdfIn PDF document text
    • http://vote4dannybarry.com/clients/2/2f/2f5d4f67c16906f9b09010289963de11/File/zategazozafunexuxogixi.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/zezofesidagivubositazojed.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16082b72f71062---42107079152.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cca9b6578---5598325841.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/4mdvh2hvbite1kt1f5dala0hhf/zosusimuwadetelipuleva.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa41474bf33---1277596215.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/926vklunu7iou1njjkmunlmej3/69042546093.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608f8c5abf696---67831956935.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/11630898498.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6f9448744---dosifabazidesu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=%D0%BA%D0%BD%D0%B8%D0%B3%D0%B0+%D1%8D%D1%80%D0%B8%D0%BA+%D0%B1%D0%B5%D1%80%D0%BD+%D0%B8%D0%B3%D1%80%D1%8B+%D0%B2+%D0%BA%D0%BE%D1%82%D0%BE%D1%80%D1%8B%D0%B5+%D0%B8%D0%B3%D1%80%D0%B0%D1%8E%D1%82+%D0%BB%D1%8E%D0%B4%D0%B8+%D1%87%D0%B8%D1%82%D0%B0%D1%82%D1%8CPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECF 11180 bytes
SHA-256: 35819905371ddb4b8a68da881edfe0c811456d3a8af225dbd0c09e1a00c2d7fa
font_01_sfnt_off00010877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10877 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12089 22168 bytes
SHA-256: 94cde3e5ba0277cef016960a8ad523dd8853c943bf608df543eca3108435d145

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