Malicious PDF — malware analysis report

Static analysis result for SHA-256 16fdcbe8fa970047…

MALICIOUS

PDF

96.7 KB Created: 2021-07-03 00:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a911f153fd352cb7d00d36a48e8bd548 SHA-1: 85ce511d8f7117f89497741417f30d7be473449d SHA-256: 16fdcbe8fa9700472aedddf67aefc0f304a25e81257ead3be12347bdbb17cb8a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm that redirects to multiple domains, many of which are hosted on compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL findings point to a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/b1b3eed02483b14c5bbd8345b2bc8b2b/rozodowutevupefiwomiga.pdf In PDF document text
    • https://careersourceokaloosawalton.com/files/public/figizazutemixis.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ac56a4024---85458251168.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca0cee1ce0---49455524198.pdfIn PDF document text
    • https://vigiweb.cl/dinamicos/files/file/28700763341.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/vt9a54a2313ga1kinj19ete9a6/wovutitisef.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/xanuxazalimibolibo.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c141faa1c3c---6095131052.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/71921011993.pdfIn PDF document text
    • https://actorconseil.com/files/file/32545801979.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/32633480959.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1e6e25f48---79398928398.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/jitinokuxup.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b773bd94be3---6369971436.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/63c7da164551e285772fc80057a04172/dugoj.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/303ac40947a2fe40024e648ba6a34f0d/takipepozebiwam.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/lkq0j9n29334vommcvugumari2/genamumoberunewedabu.pdfIn PDF document text
    • https://nanosoft.mn/images/content/File/lotakusakevaxade.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/e2da4022d7ce6ecd776ef983353d60aa/pizopasuxuwinerufivukinu.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/sdal8pfsv3db59v45d316bvrqj/pibixifawifi.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/0e703ee26e10bf757b260a6be0cf3f57/sevebanedaxolowe.pdfIn PDF document text
    • http://easytravel63.ru/ckfinder/userfiles/files/bovijovafipesazu.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b4a78f2e359---garoruvutipazosijadigap.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/99001148679.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/gizumerefonov.pdfIn PDF document text
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/61923489204.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=samples+of+personificationPDF 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_off00011870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11870 10716 bytes
SHA-256: 3cf6c21660de8a1b65111d5832faecfb6c922b41c39a83484d282b14eb09545b
font_01_sfnt_off000130fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001490f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1490F 17128 bytes
SHA-256: 10f775fd3d5d0c2602e5d3b053d1f94d1596d1098a72b2bb561dcc8a938bb925

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