Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dd3e8ebb81650ed…

MALICIOUS

PDF

72.5 KB Created: 2021-10-02 18:02:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: cc1b58ad90f8bf83811253a85ceb63ca SHA-1: 5d0adea4584477f69a4a314d70c67d0b61262378 SHA-256: 5dd3e8ebb81650edfb5adf412e2010fc32fa9e59f5c993d2754f2425dacc2aa4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://garglob.ru/uplcv?utm_term=incident+investigation+report+example PDF link annotation
    • http://school15-tyumen.ru/f/guvaxisopifefuk.pdfIn PDF document text
    • http://istanbulballoons.com/ckfinder/userfiles/files/50013831647.pdfIn PDF document text
    • http://xn--80aer5aza.xn----htbdepbihnfb8cyg.xn--p1ai/ckfinder/userfiles/files/63731923984.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b364519b2e---39527502196.pdfIn PDF document text
    • http://www.sunriseacademy.in/ckfinder/userfiles/files/senipajag.pdfIn PDF document text
    • https://aczv.fr/userfiles/file/wegegadozewoja.pdfIn PDF document text
    • http://elma-itc.ru/!upload/files/32781728252.pdfIn PDF document text
    • http://bluebirdcanada.com/FileData/ckfinder/files/20210909_52E0C81AFB4EB84D.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/12332685828.pdfIn PDF document text
    • http://gima.ge/admin/ckeditor/ckfinder/userfiles/files/13138550496.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1614c1ed148864---wilidifurigewetifafenavez.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/4273325241.pdfIn PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/54685880247.pdfIn PDF document text
    • http://letresorellebio.it/userfiles/files/givomonaxok.pdfIn PDF document text
    • http://shiokuda1.com/contents/files/85049702252.pdfIn PDF document text
    • https://pasarantogel2.com/contents/files/zupolebosijazixepuwu.pdfIn PDF document text
    • https://lockerova.eu/admin/upload/documents/24760130104.pdfIn PDF document text
    • http://badgerhillfarm.uk/pugadexiwudozojuma.pdfIn PDF document text
    • https://www.champagne-cornevin.fr/ckfinder/userfiles/files/72484444873.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c0ea45db6b---41804213486.pdfIn PDF document text
    • http://maturitni-ples.eu/UserFiles/File/52697102819.pdfIn PDF document text
    • http://canadianrockies.info/files/file/bemugoroka.pdfIn PDF document text
    • https://bulgariapools.com/contents/files/17899944868.pdfIn PDF document text
    • http://duhocnhat.vnpc.vn/images/noidung/files/bixagetaf.pdfIn PDF document text
    • http://amy-tsai.com/images_express/userfiles/files/21319359302.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_off0000b72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB72F 10976 bytes
SHA-256: c8db2939f8a01672704519d9269d523ee74f5ca1b5f463a4952da73383a4dcc0
font_01_sfnt_off0000d07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD07F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE891 17100 bytes
SHA-256: 4ca9e332ae59003c5bb52b00eb91706eca695f7c252de615ec5a40e3a2e70ca8

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