Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee14ccb7d9d6c3a…

MALICIOUS

PDF

76.2 KB Created: 2021-09-13 06:59:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6fecf234e7a28a1f3961a6c3141ee49d SHA-1: 552cef699c266b3827c7aa46fa2b288f04bdf087 SHA-256: 4ee14ccb7d9d6c3af80495fa21be0e200c125d1e698d6c5b627b224f39ef268e
156 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with multiple URLs pointing to potentially compromised websites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms strongly suggests an attempt to redirect the user to a malicious site, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://thekreativecompany.com/uploaded_files/userfiles/files/28996608010.pdf In PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613659354468f---duxowitewukuvi.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/63304124247.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/6a2afcbf72b10947bd8b3ac5b55b13c2/xetufuvugojeneratufumu.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16135d6c5865f3---xopalidaku.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/30876395533.pdfIn PDF document text
    • http://topliving.sk/userfiles/file/sefufutuz.pdfIn PDF document text
    • http://marchmontnews.com/imgs/file/34935969889.pdfIn PDF document text
    • https://apteka-wratislavia.pl/halatecza/userfiles/file/8809739033.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132727854870---puvobomip.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/20729203752.pdfIn PDF document text
    • https://asesoriagade.com/app/webroot/files/files/vajofitep.pdfIn PDF document text
    • http://handinks.com/ckfinder/images_store/files/simisubupawebafu.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/tijuwomizaxetilekutataj.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/39590482717.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/jusiwun.pdfIn PDF document text
    • https://www.wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/pogijok.pdfIn PDF document text
    • http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/munibuwolurezonadaki.pdfIn PDF document text
    • http://xn--c1aejbdnke.xn--p1ai/admin/ckfinder/userfiles/files/simez.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/rukerifefafe.pdfIn PDF document text
    • https://mcq.bmtinhoc.vn/InteriorWeb/images/images_news/files/belexitamafisexazalo.pdfIn PDF document text
    • http://houstontca.org/Content/uploads/files/6651222582.pdfIn PDF document text
    • https://holcom-wd.holcom.vn/webroot/img/files/jupiweragatemigube.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16130591f93ad2---83000034884.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/lunuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=from+pdf+to+pptx+onlinePDF 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_off0000bd53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d56a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56A 10408 bytes
SHA-256: 35841e0a7ce1a4d1ba68cd0400f694c9b6eb2b987394a2dca3b6382df88f8385
font_02_sfnt_off0000ecde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDE 20624 bytes
SHA-256: b757d34826f22e1d5a646c0c84ce6d6476042500a3b453874232a26b98355766