Malicious PDF — malware analysis report

Static analysis result for SHA-256 d905ab30ac737087…

MALICIOUS

PDF

140.9 KB Created: 2021-09-07 09:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7064f0ea13f2943ef2718bd442635d75 SHA-1: 1667d10619a0df75925aec260622673c8135f474 SHA-256: d905ab30ac737087326a1f61a15b021748ca650f05badf213e757a96b23824ff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL analysis indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9838

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://daiichitravel.com/uploads/news_file/97078087101.pdf In PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b47cee61470---foxodibifu.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/24e6bad918b953a74c8871c300671107/64408273192.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/190a940b307d147ca9ae956e240188e6/21282664050.pdfIn PDF document text
    • http://alliance-vietnam.com/upload/files/susirejuselowozepidop.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/95782367927.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/2287d3e03a54b746ed4bde4ee9216b6a/waxojakot.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/difilovobitilav.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0a08353aa---14691295607.pdfIn PDF document text
    • https://buka.ru/sadm_files/24103943139.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/84372272011.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/kexazelemanivitulufibe.pdfIn PDF document text
    • https://elegune.net/files/galeria/files/17974472928.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a948406555a---domegafolatitofi.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/86094579360.pdfIn PDF document text
    • http://annassteen.com/ckfinder/userfiles/files/jafexemosoxuf.pdfIn PDF document text
    • http://belgium-ex.com/images/blog/file/56598724367.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1625366609.pdfIn PDF document text
    • http://drxzhang.com/userfiles/file/kaxatewusilovuxijimixavit.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/fe4da2ead31bafd8da9b8b635f13110f/jurizuvexeteniviwejizo.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/40509459615.pdfIn PDF document text
    • https://pbpkrosno.com/fckfile/penikomavuxu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=allama+muhammad+iqbal+books+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A383 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001bb9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB9A 10788 bytes
SHA-256: a4de06ca803f3c7e85438ccd33c5624bfd63d4ab445035eeee675d3b00997dc4
font_02_sfnt_off0001d3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D3EA 22976 bytes
SHA-256: 7c71c96a514e8ec38757fb23534c7be71bb2820bd5e0055ad0a3db59d41b2ed4
font_03_sfnt_off00020fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20FA1 16148 bytes
SHA-256: b17e3c388ca520c70044df51a505a8c8de3d1ca9b2e495c629779bc8d31aca59

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