Malicious PDF — malware analysis report

Static analysis result for SHA-256 047eb6a1ce995616…

MALICIOUS

PDF

102.5 KB Created: 2021-06-29 04:10:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: d9f265bce00fdc38d68dfbe9aee8412b SHA-1: c05928325ce0a4e1f228fdb4c206fcae03afee9e SHA-256: 047eb6a1ce99561631d91eab880d86c38450dc0ce5406b93a4986c64bd11c7e3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various websites, many of which appear to be compromised WordPress installations. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting an attempt to lure users to malicious sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

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://allytemp.ru/uplcv?utm_term=fx+goat+2.0+course+free+download PDF link annotation
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160715946555e8---56161153066.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607066e694379---sutezalowe.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f161beb277---litizexo.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/78fc4500017001a18797ed8c1169bd5f/nusisodolovetix.pdfIn PDF document text
    • http://www.elstar.ru/uploads/files/53979497195.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/45385673264.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/65247339f1b832b7d0c155930c7fa03c/17089724550.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/b4bb0c031b93cf65b47c2d2f4ce3f585/ranomofov.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1609450b35241f---88535681072.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/a7pg1qo0m685o8i92r11j0fpk4/31556323913.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/dedenafelamu.pdfIn PDF document text
    • https://beyondpins.com/calisma2/files/uploads/4921684186.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be3cbd7041c---bofewuwiburobesanew.pdfIn PDF document text
    • http://aristosaigonhotel.vn/uploads/files/gezaxuz.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/8322fd8ec7aa0e7ce65de5e10fbfa1a1/609831492.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160732c0e9f02a---76209275991.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/009ha1179ocoatpef2ohd0l3f0/dimojepomifam.pdfIn PDF document text
    • http://blackshirts1962.com/clients/f/f2/f245580d3072b78cda2271cf7a7e3f61/File/52224404513.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/f29e8a0cc641e6c925e90b6ac17d4f53/lezesekikizobusa.pdfIn PDF document text
    • https://biorenta.lt/ckfinder/userfiles/files/guxoferafaxebanupu.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/61138876497.pdfIn PDF document text
    • http://eastmoorclassof1970.com/clients/4/43/4343e427eb1b0a0668350338a4d6b623/File/49149011820.pdfIn PDF document text
    • https://dock-levellers.com/upload/files/zegifenegetunajawodovexem.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16073d5bb8b297---68620984168.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cfb53541d---zejegororimuzutofebin.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_off00012bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBC 17672 bytes
SHA-256: 8f5257c0693b3f3c10edb55454250ea6e2bb092c45cfff7b8034b0b2b78bed20
font_01_sfnt_off00015a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A81 11132 bytes
SHA-256: 18ba58b25c0ca70df982170a52f769d14ec7ebdac0bb3ea1e02596949049de15
font_02_sfnt_off000174a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1