Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaf596ce97f54ccd…

MALICIOUS

PDF

89.2 KB Created: 2021-09-01 21:00:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8ca95fee7a5c8e106695cc84db442496 SHA-1: a8694300f7b7ed668a14ca6c38b83513521f0098 SHA-256: aaf596ce97f54ccdbf8c8c1fe1d997dd2f0688505c2e363f63351b224d06e228
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable hosting or compromised WordPress sites, suggesting a link farm designed to redirect users to malicious or phishing destinations. The ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://inwebjor.ru/uplcv?utm_term=tea+for+two+and+a+piece+of+cake+pdf+free+download PDF link annotation
    • http://pappteam.hu/userfiles/file/gunagese.pdfIn PDF document text
    • http://blueyee.com/upload/file/030952544139.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/10375953619.pdfIn PDF document text
    • http://alexandraharris.com/clients/36054/File/wumixagewijexu.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/199a00080917d177714148edb68deb09/widijuloziras.pdfIn PDF document text
    • http://moscowballet.ru/userfiles/file/sazuvabobop.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/28522571242.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a757bcc1c23---pamovin.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/towubudigifogowu.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/botijedojanerolu.pdfIn PDF document text
    • https://unitedpetexpress.unitedreloth.com/ckfinder/userfiles/files/4934298150.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16126ba1bc6eff---boloremebomoje.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ckvergbuqc9hv5d1jqpfnqm8vj/xilupit.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf28623fd44---farabomiraru.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/161064f01e9b69---28195479976.pdfIn PDF document text
    • http://conelser.hu/fck_uploads/file/veluziwosunefi.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/96002171943.pdfIn PDF document text
    • http://tangneylaw.com/admin/images/file/87538460280.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/e269b19138a79eaa9165bc54813ab1f8/simirefetovogewomatidiso.pdfIn PDF document text
    • https://nakshistudio.com/ckfinder/userfiles/files/37770440032.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/d6942675c01e6fea21430457a15f990d/bopanatenalefusurebaxoko.pdfIn PDF document text
    • https://miet.hu/kepek/34689227756.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_off0000f643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF643 10584 bytes
SHA-256: 66bd3618fdd21ba6e775dbef3a698813d053159e4e9fa4ad4b4f78932667cf47
font_01_sfnt_off00010e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126AB 18600 bytes
SHA-256: 3f9cb784edb4cb59e5c8b7ab312334c4e6b61cd9439bf56bf09765767bfd0cf5

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