Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2327eb5bd026740…

MALICIOUS

PDF

70.0 KB Created: 2021-09-25 01:14:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8be909d00c34fb934d7c3c465cbfaf5b SHA-1: 11d4e27f29d791228fea5db74615f17537d47554 SHA-256: c2327eb5bd0267406ff16df7d4eb8be14000e1d16539113674c84d796e426c55
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable links. The ML classifier and ClamAV detection strongly indicate malicious intent. The document likely serves as a gateway to a phishing site or a malware download, leveraging multiple compromised domains for hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://haohanlegend.com/Uploadfiles/files/rimeg.pdf In PDF document text
    • https://shreenathtechnologies.com/userfiles/file/91822914770.pdfIn PDF document text
    • https://priscar.com/documents/files/94424021132.pdfIn PDF document text
    • https://hamzakocakoglu.com/userfiles/file/88159846675.pdfIn PDF document text
    • http://disonde.com/filespath/files/20210908044809.pdfIn PDF document text
    • http://marcus-1.com/FileData/ckfinder/files/20210906_A9B04B865609095A.pdfIn PDF document text
    • http://abwingstop.com/uploads/files/tivovoregum.pdfIn PDF document text
    • http://lactopad.com/uploads/files/13975519921.pdfIn PDF document text
    • http://myslizdrave.com/soubory/5534527489.pdfIn PDF document text
    • http://sarkar.ie/userfiles/file/vupaxamusef.pdfIn PDF document text
    • http://auroraenergyproject.it/userfiles/files/pukaza.pdfIn PDF document text
    • https://www.la-melodie-des-saveurs.fr/ckfinder/userfiles/files/gasunanizeluka.pdfIn PDF document text
    • https://imaggu.com/ci/userfiles/files/46241646198.pdfIn PDF document text
    • http://itfkarnataka.com/cvsprojects/SSK/Source/2.0.0/images/files/63127816403.pdfIn PDF document text
    • https://777mto.com/contents/files/65073095033.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/xeguvagod.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/faaab99e72973c91864700d14c692434/1706118708.pdfIn PDF document text
    • https://sanmuabancongty.vn/images/content/files/laxenonegogitov.pdfIn PDF document text
    • https://foulardfotografando.it/file/94165642400.pdfIn PDF document text
    • https://receptabc.hu/images_banner/files/4041388917.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/7729e3ff473d1bad6e376337002b1389/78641826581.pdfIn PDF document text
    • http://mayepnuocmia.vn/data/ckfinder/files/21080726022.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/8741728844.pdfIn PDF document text
    • https://vinaarc.com/app/webroot/files/ckfinder/userfiles/files/79328008065.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614785114c1a4---5624463366.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=not+another+teenage+movie+full+movie+2002+englishPDF 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_off0000b26c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB26C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA83 11048 bytes
SHA-256: 369339645bfddd6324bda435c00d212addff6df00875f0b1e0b2de258725713b
font_02_sfnt_off0000e41c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41C 14308 bytes
SHA-256: 3c2a20a512403f320f3cb933502ad2002dd31122ca438e7ce898a6da828a7d49