Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da9dfb06c7033ac…

MALICIOUS

PDF

80.8 KB Created: 2021-09-14 13:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 44bd596b58a796d712d5e4812a2e284d SHA-1: 6cf6ca9a68c383727d957f561ee4654ec4ced379 SHA-256: 0da9dfb06c7033acf7f0deb855ef9df672905e3a016dc305ccfd19e4621ac149
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to obscure the true destination. The PDF structure and embedded content suggest it's intended to lure users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://yesfabric.com/images/upload/File/tedabap.pdf In PDF document text
    • http://balashixa.inhome360.ru/admin/ckfinder/userfiles/files/64764058697.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/fukomirulagavazusa.pdfIn PDF document text
    • http://tingchucontrol.com/Uploadfiles/files/69840442633.pdfIn PDF document text
    • http://geometracosentino.com/userfiles/files/silobarusiwunagubux.pdfIn PDF document text
    • https://medgal.pl/admin/ckfinder/userfiles/files/7512691951.pdfIn PDF document text
    • http://dyccpharma.com/upload/files/2216677130.pdfIn PDF document text
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/66391458214.pdfIn PDF document text
    • http://sin-hua.org/userfiles/regijimijirilitafawesed.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd0a1e88de---91299662432.pdfIn PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72235500169.pdfIn PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/nikidelazasenisoxupav.pdfIn PDF document text
    • http://strandedtattoo.info/file/fogikediminonapinijer.pdfIn PDF document text
    • https://darshanam.com/ckfinder/userfiles/files/rosaloxilezazasugizokik.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/2143061552.pdfIn PDF document text
    • http://tsnpharma.com/upload/files/nobome.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b62a9e0d01---mazebubizanumipodirugara.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/79493096617.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/wononumosatusulinetili.pdfIn PDF document text
    • http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/vulosotas.pdfIn PDF document text
    • https://larioenergy.net/uploads/file/46309503991.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/lexigozasazejolakemol.pdfIn PDF document text
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/ruwepomomivavixefimobup.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/fozav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=mastering+professional+scrum+pdf+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_off0000d4e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E8 17872 bytes
SHA-256: 42988bcc976d88285274156aefbc4d7dd9107ef2a6cf011d464ae228f9d44c7a
font_01_sfnt_off0001032b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B42 11144 bytes
SHA-256: eb7dba162fce51f44dcdab4df4d51fe5d310cc542b73b1687fd8e924598f7cc9