Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b2ddabd097532c…

MALICIOUS

PDF

98.2 KB Created: 2021-08-04 18:51:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 738dc907bd486fd355721455a722afb5 SHA-1: 032fc7c633747efb28c35f31daba6fd64050ef59 SHA-256: 86b2ddabd097532cafb9753a820cce4a2437173bf06c4d84701d813f8641bb1c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous compromised WordPress sites and disposable hosting, suggesting an attempt to obscure the ultimate destination. The presence of these links indicates a likely phishing or malware distribution attempt, where users are lured to click through to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9021a9fa82---voburifosido.pdf In PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/39et28rpahs4b6t6re72ut6oq4/38965049564.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/34451743434.pdfIn PDF document text
    • http://108homed.com/userfiles/files/dujar.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/77191776056.pdfIn PDF document text
    • http://gujaratbusinesspages.com/userfiles/file/75224485733.pdfIn PDF document text
    • http://abwingscolley.com/uploads/files/dadefutakivazez.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160bfac4c04a3b---99777926566.pdfIn PDF document text
    • http://johnmarzillier.com/ckfinder/userfiles/files/88107334963.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/18399095185.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210615_7974469C659E2B8A.pdfIn PDF document text
    • http://www.irrv.org/uploads/files/20322566642.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160acb33567e93---selabewitawisuxafulewip.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210724074825.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/buxurowonaturakixafudin.pdfIn PDF document text
    • http://gaushalango.com/uploaded_files/userfiles/files/38394632308.pdfIn PDF document text
    • http://sharon-barron.com/userfiles/files/gubikepefifigibezejara.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/595d54998869dfea2981923d5e62d3fa/tetewewogekedi.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa17af0c16---lulilanotatosa.pdfIn PDF document text
    • http://amandamaitland.com/images/file/91100491989.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/49pfuc5nahrbulvslsncvj0b25/18025393933.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/40800150882.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5d3ef0682---92045809704.pdfIn PDF document text
    • http://zulassungsdienst4you.de/bilder/file/69509653464.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/1bfv6hcnmros6d5cn1ceqvaug2/dufaxukebalozagusotip.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/piporosezori.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c78931a7fef---52537564318.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=barbie+dreamhouse+party+game+free+download+pcPDF 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_off0001194e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194E 17340 bytes
SHA-256: 7dec222c7ff3094c18793c5afe957ec8b953b5ebc31eb3aaf000f4e39bdea1b7
font_01_sfnt_off000146a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015eb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EB8 11560 bytes
SHA-256: 7eec5e074f602586154cc0f8f09deae7e27efea7d38a622ba1299f121f9e8237