Malicious PDF — malware analysis report

Static analysis result for SHA-256 570bff319f919acc…

MALICIOUS

PDF

75.4 KB Created: 2021-09-14 09:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4b223ab532e281848f162705e9c39d8b SHA-1: eaa648ae9f69c6060441f663767c89f6296ea18a SHA-256: 570bff319f919acc032ccc88bd5bbb69bc8a8f6cee4c8aff3e00eded0c25fc75
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites and disposable hosting, a common tactic for distributing malware or conducting phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs suggest the document is part of a larger campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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://glamweddingdesign.com/userfiles/file/49868253859.pdf In PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/b4b6a812bb5e15402f7b8139e1196c56/80136451919.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161310b4d7981f---tuwuredebagulakorapud.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/7542943336.pdfIn PDF document text
    • https://alident.centralcms.cloud/galeria/files/zelajetajexojad.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/31d35f2744a8809d349f5c2056c752cb/teleg.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/17488887747.pdfIn PDF document text
    • http://h-p-n.fr/catalogue_dynamique/file/69754165587.pdfIn PDF document text
    • https://ojazzdance.fr/userfiles/file/lijenibekarilox.pdfIn PDF document text
    • https://kede.org/userfiles/file/tivezodosulavadepafumurut.pdfIn PDF document text
    • http://sofia-es.tokyo/yamituki-n/uploads/files/pobobinezifetunetug.pdfIn PDF document text
    • https://citytrafik.nu/images/file/juxefokapelitenarutefe.pdfIn PDF document text
    • http://www.rpv-drachten.nl/files/file/96080485993.pdfIn PDF document text
    • http://techbis.pl/files/file/lagulanubi.pdfIn PDF document text
    • http://www.lalorraineperdue.com/documents/9230037298.pdfIn PDF document text
    • http://aven.su/userfiles/file/80123899902.pdfIn PDF document text
    • https://www.benkorner.nl/admin/library/ckfinder/userfiles/files/bupasosakebuzotiwuzefeji.pdfIn PDF document text
    • https://stoneappeal.in/FCKeditor/file/58473389032.pdfIn PDF document text
    • http://agrostroi-proekt.ru/ckfinder/userfiles/files/pamakewelububus.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/76787033699.pdfIn PDF document text
    • https://lostfoundglobal.com/userfiles/file/jovigetenaruj.pdfIn PDF document text
    • http://ilink.pl/userfiles/file/27565096189.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/0ba2da03a79093cc15540969e2c4377f/gilizam.pdfIn PDF document text
    • https://huangs.tw/uploads/files/202109011223367231.pdfIn PDF document text
    • https://myshalewell.com/userfiles/file/bogizisizuja.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/wesipewilumi.pdfIn PDF document text
    • http://phuquytravel.com/nguyenvanlinh/files/xixaxud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=onenote+2007+download+for+windows+7PDF 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_off0000c2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2E3 17172 bytes
SHA-256: b3a73c569aff69b4ee54e19f69b7d2ce51505db754373bf166be2598ac1587c3
font_01_sfnt_off0000eeda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F1 10752 bytes
SHA-256: 6b5dfc76419e8a94be61919217459dfd5657d8240cdf9d354f1b21ee10ae9fdf

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