Malicious PDF — malware analysis report

Static analysis result for SHA-256 54feb02c5fe210aa…

MALICIOUS

PDF

83.1 KB Created: 2021-09-19 01:22:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8c8150f6417efbda361b5ecb9e614b71 SHA-1: 0bbb78bdccb5545494f78216d116c91f0ca748ff SHA-256: 54feb02c5fe210aa532ace17bd1afe4caafc3b4f3d6df00c40bc290cdada3e54
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous external URIs and is identified as a link farm, suggesting an attempt to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://clarklawtexas.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/41013452851.pdf In PDF document text
    • http://ayrh.internet-match.com/upload/files/63116689199.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/jawibakofesadibulefimazu.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/gudazejamaxarukifaj.pdfIn PDF document text
    • http://suamanhinhlcd.net/userfiles/file/bomipexigusexinitej.pdfIn PDF document text
    • https://nayyaralidada.net/alpha/ckfinder/userfiles/files/sunivewamepepofepi.pdfIn PDF document text
    • http://naturestuff.nl/siteimages/file/91869660417.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/47674677928.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613247b107a67---15612006977.pdfIn PDF document text
    • https://nikunjfoundation.org/ckfinder/userfiles/files/79870553089.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/91765112164.pdfIn PDF document text
    • https://holycrosshealthcare.com/userfiles/files/numalizobenuviwitopi.pdfIn PDF document text
    • https://universitecentrale.net/uploads/FCK_files/file/zewenugedawesovadilo.pdfIn PDF document text
    • https://alpasol.e-giant.net/upload/files/bewufuvixe.pdfIn PDF document text
    • https://loyalangkorapartment.com/userfiles/file/wubulus.pdfIn PDF document text
    • https://arnetbilgisayar.com/upload/ckfinder/files/vubijadesazedufefafarid.pdfIn PDF document text
    • https://ovistar-dz.com/ckfinder/userfiles/files/wumugaxoxuvepuzozibatanuw.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/farujenovimolebevokope.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/190609028852.pdfIn PDF document text
    • https://digireg.it/upload/37595620931.pdfIn PDF document text
    • https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/tojut.pdfIn PDF document text
    • https://legend-chang.com/UserFiles/files/runebezokagagotoba.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/161461fb558493---68523697476.pdfIn PDF document text
    • http://taemyung.com/data/upload/file/34435435320.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/55933220679.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/xowakel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=duplex+play+apk+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_off0000df5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f76e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76E 18360 bytes
SHA-256: eec0f12f1d22693b2dfba97da03356643ed00843289a365049056e03a7984898
font_02_sfnt_off000126a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A8 10420 bytes
SHA-256: bab5358fea8361f4c76acbeb42dd8415a2c99013bf519d781520b9b33df418c4