Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5a5150e67e8ea0d…

MALICIOUS

PDF

79.7 KB Created: 2021-09-17 09:42:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 4f157440d3499ce088d2eceeadc61915 SHA-1: 67eae7d7eed428832c0f46124c5384ea440a3519 SHA-256: b5a5150e67e8ea0dd744f30a763ec4fb82f26a9dd4fd18b41386c1f3616e3da4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs pointing to a link farm, suggesting a phishing or malware distribution attempt. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to obscure the true destination through multiple redirects and disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://abofahed.com/userfiles/file/wuxedufevubikudotafonoge.pdf In PDF document text
    • https://pasarantogel2.com/contents/files/kajujomej.pdfIn PDF document text
    • https://hattoco.vn/images/ckeditor/files/jepunudijiwowunomajavenu.pdfIn PDF document text
    • http://aldobini.it/userfiles/files/94342030438.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/14645060697.pdfIn PDF document text
    • http://svazekobciorlice.cz/userfiles/file/kemovudebewata.pdfIn PDF document text
    • http://photopuzzle.net/userData/board/file/vazupiguxamajesa.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/86381392706.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/bakigazofedoxabejibujeboz.pdfIn PDF document text
    • https://galaxytraining.examinationonline.com/files/51380313642.pdfIn PDF document text
    • http://monthclean.com/uploads/files/202109100402007421.pdfIn PDF document text
    • https://oxi-dental.ro/imagini_ws/74470614953.pdfIn PDF document text
    • http://asqcert.net/files/files/7864623935.pdfIn PDF document text
    • http://attlas.center/userfiles/file/65797221145.pdfIn PDF document text
    • http://uklearningnetwork.com/userfiles/file/80166244315.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/7de2bf1ba2390e3a44e01653d984bd8c/57337549625.pdfIn PDF document text
    • http://slr-eyewear.com/slr/userfiles/20210913223744.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/523ni0vmm82f968s2jjro7vvfl/majexakeludaludimal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=facebook+lite+old+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_off0000d48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48E 10388 bytes
SHA-256: d4bdd9a1e37bd8f7f50b2c39bf7c029a3835ff94113d63323cb0d417321418e3
font_01_sfnt_off0000ec33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC33 17316 bytes
SHA-256: 09e2711f3d0b09b571ad8d94aaf64ffb0968a6d07977b1f634a19dcc0f3ba4dc
font_02_sfnt_off00011945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11945 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.