Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae75faa996686b5…

MALICIOUS

PDF

86.7 KB Created: 2021-09-23 00:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 702fe0e63d4a55791c2e6d30354667fd SHA-1: 6c193a58d4816c94db7c880c8428c4adecff2172 SHA-256: 0ae75faa996686b50d70c39a9c6c2bfbeaed559b9c85a545c118eb3e4876f860
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to facilitate the download of a second-stage payload. No scripts were extracted, but the PDF structure itself is used to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://remini.hu/userfiles/file/61577370333.pdf In PDF document text
    • https://novsport.com/content/File/wudalizagudowepadazu.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/doziva.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/48157779062.pdfIn PDF document text
    • https://novamakine.com/upload/ckfinder/files/25394513964.pdfIn PDF document text
    • http://ihanzao.com/userfiles/file/20210923052050_1259624506.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/55235400740.pdfIn PDF document text
    • http://gianniarnaudo.com/userfiles/files/somewu.pdfIn PDF document text
    • http://discus-rus.ru/upl/file/gufasunuvifogifopuxewakaj.pdfIn PDF document text
    • http://vibestedu.com/_UploadFile/Images/file/12350927428.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613243c2e11e6---66995496212.pdfIn PDF document text
    • http://biomehl.com/images/content/files/5662950483.pdfIn PDF document text
    • http://nhadephoanhao.vn/upload/ckupload/files/ketizawokodopib.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/xarifovej.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161383d5a7fbc1---87993848246.pdfIn PDF document text
    • http://thegioituigiay.net/uploads/files/zufubeguxubinudaxexow.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/rifubagulepokutu.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/vogomotenag.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/61475373332.pdfIn PDF document text
    • http://dentistturkey.com/image/files/8850205244.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/b2109e491eabe7e4a2dbe0bf7ba5e76d/85591814152.pdfIn PDF document text
    • http://4bx.pl/public/file/wuforiliwiwudoj.pdfIn PDF document text
    • https://superiorservicesandsolutionsfl.com/nbloom/fckuploads/file/poxobagon.pdfIn PDF document text
    • http://kjphotocon.org/data/userfiles/files/fovofikapodokub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=run+free+unblockedPDF 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_off0000ed02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10514 18756 bytes
SHA-256: 08b14457d7d1931c313a4db85df71be4fa15d02a9510adaa27846b0d954e6e11
font_02_sfnt_off00013638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13638 10328 bytes
SHA-256: 90ed6d70ee9d4f419393720192fed3ea18a241a0603146affcdc665f713060b7

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