Malicious PDF — malware analysis report

Static analysis result for SHA-256 32562292a9523b6b…

MALICIOUS

PDF

79.5 KB Created: 2021-06-30 08:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 9c796b4d094e5251fbcdd2d2eb270008 SHA-1: c96eb3a1ac0676c72d81bc4f7cd54ecd6269e7cb SHA-256: 32562292a9523b6ba1749d1044b0d95e767f3e60dc8a5bc211caa9109a82d5d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites. These links likely serve to distribute further malware or host phishing content, aligning with the 'Spearphishing Attachment' technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/fbac5b9eb61358c62d74ea3ad9c8eea7/vifutofesuxegovuxezaloras.pdf In PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071af6be0aef---96242181043.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb6d56f4b3.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/towenudisenezixumuda.pdfIn PDF document text
    • https://bouwservicewinthagen.nl/userfiles/image/file/vemikadezoxobes.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/utubbh3pjg2sc9l60rel70mrin/34443527489.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/4dfbcbbd313e34aaaf955e3480ce14c7/41530780307.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c65683b491---58685755875.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dafaf467d5---49617900515.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/zuzufogudinokixulaza.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9a47b28dc---guxipuv.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/85363768168.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/a2ba6f60a51b17402df7b2f299bba974/zexapizelux.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/077ef4ff172ef4880dc707b9d5535287/fujusi.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/toribapowatopub.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/ggbd31mdf6o5m8bfnddvuttps5/25122860100.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/jaraf.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/wekunumitanasoxitifis.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/mejafiketete.pdfIn PDF document text
    • https://stehovani-ostrava.cz/static_pages_files/file/jojabilejamowiwometiwu.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/8245uof32ovidfbg8aron67thd/9798021611.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/sadajo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=together+with+social+science+class+9+pdf+downloadPDF 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_off0000d3e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E1 16476 bytes
SHA-256: 71dc2df3f4ec717f4d113b34b451757484748cb11de688cd55f8ebf11a8391b3
font_01_sfnt_off0000fe4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11662 11116 bytes
SHA-256: d8265c04d52124bedce7ccb09c75219825643d4bf8558e382a213a28ef830b85

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