Malicious PDF — malware analysis report

Static analysis result for SHA-256 705bdd0c2d28631f…

MALICIOUS

PDF

88.7 KB Created: 2021-09-06 21:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 8e09aad4d83b4be437bd83976f85aacb SHA-1: b4e4ddc6b3514fb37537d30b760e6fee00b35c55 SHA-256: 705bdd0c2d28631feb88526d8973a99eee85590cdafa1ea5e8021c21a681e4f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of SEO-optimized terms like '3ds max 2017 manual pdf free download' in the URLs indicates a lure to attract victims searching for specific software guides.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160780deb99b98---26440951922.pdf In PDF document text
    • http://www.propper-droppers.nl/files/file/bifunisep.pdfIn PDF document text
    • https://ashleymongolia.mn/uploads/files/vafivudutaw.pdfIn PDF document text
    • https://anhhuynoithat.com/asset/files/52152148666.pdfIn PDF document text
    • http://www.saito-ken.jp/userdata/file/kugexewif.pdfIn PDF document text
    • http://xiangzhuan.tw/upload/files/vulodawonusodaxered.pdfIn PDF document text
    • https://agape4u.org/userfiles/file/10329027541.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/fdab3f60579cc25d26d8b758a76fcdb8/83105763802.pdfIn PDF document text
    • http://whs1979.net/clients/65916/File/gigobilejaziwukotep.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b1cddc4ab---gawuniw.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/re257out4vllnodl1ud78002l1/verosinekix.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/ba3e32477614fdd47aa9eeb8a58cce4b/83676906022.pdfIn PDF document text
    • http://belgium-ex.com/images/blog//file/68386333110.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f92a3d079---70009941134.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/55803327075.pdfIn PDF document text
    • http://cartopack.be/Images/file/feginuralinig.pdfIn PDF document text
    • http://wrhs1967.org/clients/6/61/617565fc8afb9cc6d18abf932d248b7a/File/88636755518.pdfIn PDF document text
    • http://chrisdepanneservices.com/Sites/cds/files/68584359662.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c865800650---35906631956.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b4122b5059e---xivafamoviluj.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/nosijeguragux.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/dq1570j8m1eitb3h08rjv4i9d7/ximerir.pdfIn PDF document text
    • http://machinegroup.ru/img/outer/files/kegigoxumid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=3ds+max+2017+manual+pdf+free+downloadPDF 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_off0000f1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B3 18788 bytes
SHA-256: 497dd43f2730ec9cb904e57c3144250c3f90f67c867cd361240e1b6b2419faa2
font_02_sfnt_off00013a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A88 11176 bytes
SHA-256: 6deb439254093773ddfb1d072707ca49887de9113890641640d1a68566e27ff1

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