Malicious PDF — malware analysis report

Static analysis result for SHA-256 512e49d0fb3499c0…

MALICIOUS

PDF

79.5 KB Created: 2021-09-09 11:26:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 95542c578c61a670628d48b7680fc364 SHA-1: 5a8774af2d2d0eb3677f715d8c66a47e207b8f1e SHA-256: 512e49d0fb3499c047f5d5c8a554bd31c92bd88205ecd74e115837c1e274f571
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://irlanc.ru/uplcv?utm_term=buy+primogems+online PDF link annotation
    • http://cpgny.com/userfiles/files/wirogipojapaxupurawod.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/us4st9natvm37mlp3vpqrpco0a/remadebodikamex.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/doxalizezajowizibule.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/70857958953.pdfIn PDF document text
    • https://candbco.com/ckfinder/userfiles/files/burokurepapuzo.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/34426036205.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/boxebeletubotopogu.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16132e698d46aa---tofobuzulev.pdfIn PDF document text
    • https://doan295doson.vn/namthuan/images/news/files/kojalosikelozixu.pdfIn PDF document text
    • http://novichiha.ru/pic/file/86707756394.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/60668806904.pdfIn PDF document text
    • http://agmapure.com/upload/files/70510946515.pdfIn PDF document text
    • http://hiniceshine.com/upload/77226123515.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/cc2jcjalgrlrper71c7ns7m50m/63788342661.pdfIn PDF document text
    • https://tw-itemaos.com/ckfinder/userfiles/files/10386441786.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/fokenomalo.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/99301652781.pdfIn PDF document text
    • https://cpc-serbia.org/js/files/junorovefizof.pdfIn PDF document text
    • http://gtlfuelmarine.com/userfiles/file/32323101937.pdfIn PDF document text
    • http://czechnews.cz/userfiles/files/20645356796.pdfIn PDF document text
    • http://mprime.net/ckfinder/userfiles/files/63804508600.pdfIn PDF document text
    • https://masukpt1.com/contents/files/7942931170.pdfIn PDF document text
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/9327495747.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/pinobemiworusakewofigosap.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_off0000d4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E4 16852 bytes
SHA-256: a506de6e7e2fa850360bf9605a04a575bdb936cb943d9016dd8a5af9f79b431e
font_01_sfnt_off00010048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10048 10600 bytes
SHA-256: dd33a34ddf167f13e4fbf5bef21e7ca1da1d64b00b080ea08db637dba25a10d4
font_02_sfnt_off00011879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11879 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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