Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6743f74b087e06…

MALICIOUS

PDF

114.9 KB Created: 2021-09-05 09:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ecc5152343c63052e38cc541d8e286ed SHA-1: 3808bf631a4becd0a428b387d3eb749f95562654 SHA-256: 7d6743f74b087e06eac437d33d4b55fdc31f1e773ef36276600e4bf7f399376d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9873

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://djpress.pl/Image/files/51453815860.pdf In PDF document text
    • https://autoprofi.ua/userfiles/file/guxodazagizijijigozogiv.pdfIn PDF document text
    • https://raovat72.vn/uploads/news_file/mosonanulov.pdfIn PDF document text
    • http://gapoom.com/upload/fckeditor/file/29440004632.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/78721918459.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/09add9f72878d3cdf73d50dc81bc9f2b/73167273743.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/dejovifo.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608663dbeb557---balutadivejuje.pdfIn PDF document text
    • http://union.travel/ckfinder/userfiles/files/41164870123.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/41781571174.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/67576553636.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/feveno.pdfIn PDF document text
    • https://ratsimae.ee/media/contents/file/xiwama.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/170a5ce8fed8c3ccec123d137e74ae13/36334290115.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/xabemubizabul.pdfIn PDF document text
    • https://kamarkosong.com/contents/files/gikelilonenizodibokodugu.pdfIn PDF document text
    • https://combrooncom.com/contents//files/68917280194.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abdf25dd4c7---22070642563.pdfIn PDF document text
    • http://xn----7sbjvweekof5d.xn--p1ai/files/files/nifoselovenelituzozi.pdfIn PDF document text
    • http://vienkiemis.lt/app/webroot/uploads/userfiles/files/51011623740.pdfIn PDF document text
    • https://bloomlight.pl/_bloom/file/gelov.pdfIn PDF document text
    • http://spbmedaks.ru/sites/default/files/uploads/fafimetukinakoto.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16086e44e05418---lapuvisilewomegeku.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/9059960807.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/pimasada.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160c320364ad42---32699956458.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=encyclopedia+judaica+vol+22+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000155f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155F9 10760 bytes
SHA-256: a8ce08b5fcd28047852435e1e18636c6189ecdb77a8e3ac10f8330960608036d
font_01_sfnt_off00016ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16ED4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000186e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186E6 20224 bytes
SHA-256: 2a5c3dd1d8284463e404fcb1fdc7065f8752c4ff33a48516d64e142b1a8c82cb