Malicious PDF — malware analysis report

Static analysis result for SHA-256 119814fcd6ab10b1…

MALICIOUS

PDF

82.4 KB Created: 2021-07-17 00:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fa53cf1f9bc28a9eb6c333e0b46f60c4 SHA-1: d7c7cb8c2cffcd828012cefe1fb1d2899eb3bbfb SHA-256: 119814fcd6ab10b10d6d9f1f651599f3accd1d954afa460796a14a02b0411e0a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially harmful external websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/8rboj02tojfih5lhmk5svrt145/nabebadazuwaluku.pdf In PDF document text
    • https://contabil-fiscal.ro/mm/file/18174337218.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ab940521063---livojojifusijugutir.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/da3fb9507ad3c741610b81491f05f343/notobosakezaxote.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c2c7b61df---lebikoru.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/64579378590.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/fiwibezozuxafakubulezi.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/61971682542.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/timodalivilixebobafuwig.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/51850151072.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/p4a4550cjc9rac672ihcvv5tbv/xutexaxulurubu.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/1nipuuqt3rd12kh2p0i04521pp/60868377365.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6436b5370---masakotabikolijesil.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/miran.pdfIn PDF document text
    • https://egca.fr/userfiles/file/93623526455.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/33768171735.pdfIn PDF document text
    • http://beateromer.com/bilder/file/zevepedanu.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160db08e4bc9d3---70520247299.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6878cd8874---tujutakuvolosisusolupuduj.pdfIn PDF document text
    • http://laweasy.kr/userfiles/file/fanenilewotadenuso.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/96b370dd4a1417feca2f462a66149df9/54962225281.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/25ec4f531cb059acaca667d1e25d99e4/wadaxizogepor.pdfIn PDF document text
    • http://nguyenquangcomputer.com/upload/ck/files/moxelobugitizegifasibi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=contraction+of+should+notPDF 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_off0000dd5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5B 17868 bytes
SHA-256: 2042847ac778cc03e1427bb122b2530eb58c5a29f3e9747ce30fccf45d56f9fb
font_01_sfnt_off00010c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4C 10572 bytes
SHA-256: 554cb774e0ed572c851322758fe6b9c5bc9b152b47e27f95929e897d87301b11
font_02_sfnt_off00012460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12460 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1