Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2da74881588f4d9…

MALICIOUS

PDF

69.6 KB Created: 2021-10-01 23:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 736eb07c260c80ba99b32cc8c528b2bd SHA-1: c8510c1a644cc639eddf674eec320c417b1f085d SHA-256: d2da74881588f4d9b1095720c01206bfdcb458d763ffe39675de160977c25ea9
176 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The PDF contains a single image and minimal text, suggesting it's designed to look like a screenshot that hides a clickable link. Multiple embedded URLs point to various domains, many of which appear to be compromised CMS uploads or disposable hosting, indicating a likely attempt to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kitpaisal.com/mypicture/file/93111141008.pdf In PDF document text
    • https://smlstripedbass.com/home/rock/public_html/ckfinder/userfiles/files/53331769482.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/f06ed59eb455d1e48d25c244f51b09c0/napaw.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/duwugizitowenozaba.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/95090350155.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/897c2924fe7d0870f7fa823459532ef9/xobidurapesoto.pdfIn PDF document text
    • http://thsport.dk/ckfinder/userfiles/files/36898178932.pdfIn PDF document text
    • https://singhaniabrothersltd.com/ckeditor/ckfinder/userfiles/files/vewilifubuvozegawopan.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/c3fceb268b4a0457dafa058491835a73/bevufifoxomalo.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/hs03hqtdhsfmsm93ekao982jtf/pobosopes.pdfIn PDF document text
    • http://taiwan-tsai.com/upload/files/8121955273.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d34e222620---luzekupijibuv.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f74552ae18---62913024248.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/didasitutevoxitebuvomamo.pdfIn PDF document text
    • http://bapassamarinda.id/assets/ckfinder/core/connector/php/uploads/files/69479350885.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/92757904881aaaa52498d32b38880078/74189584381.pdfIn PDF document text
    • http://velapower.com/glwh/UploadFile/file/2021090115185273499.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/pukolamivuxo.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/9s15jru9o28c3g2rv1fn265vrv/61660070200.pdfIn PDF document text
    • https://buonoantonio.it/userfiles/file/bukotofotowol.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/18412673379.pdfIn PDF document text
    • http://519pf.com/userfiles/files/bebugasiborufug.pdfIn PDF document text
    • http://lmnn.ru/userfiles/file/lunusuzena.pdfIn PDF document text
    • http://eng.sut.ac.th/tce/2016/administrator/ckfinder/userfiles/files/jokebedorupaxazu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=hacked+client+for+minecraft+pePDF link annotation
    • https://b2cdemo.tickets.com/content/files/28825734010.pdfIn PDF document text
    • 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_off0000b56a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB56A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD81 10696 bytes
SHA-256: 1055f36ede979bd51a7d1e97b1bec3b19230ae59069c2c3d04a9b56abcbe3e1e
font_02_sfnt_off0000e5f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F4 13992 bytes
SHA-256: 60eab8b425e5cdb0d641c408cdd5caa9276a822fb619d362dcc66f531d562bf7