Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59e1246a114752d…

MALICIOUS

PDF

102.7 KB Created: 2021-08-26 06:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 42321c8714894391b8401739975d3e96 SHA-1: 93216365df72633ba82034fe7ef1844cdd279266 SHA-256: b59e1246a114752d2079095957218b1dfc8f628e2ebbd66b39ce1962ae7615ae
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature. The embedded JavaScript likely facilitates the redirection or download of further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7085

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://veitali.com/upload/files/febarerir.pdf In PDF document text
    • http://energosol.pl/images_cms/file/viloru.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160935245c2513---lanenonogaz.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/murosunasagamijalis.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/a8253c0fc0ea89059d1484f559a0fee1/98968127627.pdfIn PDF document text
    • http://linhkienhunganh.vn/luutru/files/18686871387.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/goboxasawapeno.pdfIn PDF document text
    • http://hongdacable.com/d/files/petukusapesakowul.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/lifozevixudigotisan.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/tikakatofemutotikazokeg.pdfIn PDF document text
    • http://dentherapia.hu/files/file/medoridotazezirixar.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/ru3o4b0djl8ddlscugapqm6ngl/vikutiruxi.pdfIn PDF document text
    • http://haisushitogo.com/uploads/files/54636130074.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/lesidenagani.pdfIn PDF document text
    • http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/12909691008.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829ca7f126b---67460691756.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a58e2f29760---ladudiwel.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/282cdfc544329eb1e58339afd8fee406/julajavidajideziros.pdfIn PDF document text
    • https://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/30623625761.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f47d15e677---tiwavavonoxim.pdfIn PDF document text
    • https://biholka.cz/uploades/userfiles/file/6020265475.pdfIn PDF document text
    • http://focostrade.com/files/20210629085526.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609f02de39012---58199970209.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160881df5da0a4---63792733729.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=introductory+circuit+analysis+boylestad+11th+editionPDF link annotation
    • 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_off0001350e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1350E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014d20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D20 18280 bytes
SHA-256: 0c333df7bebeadfa4cf964a0cba13ea7c1eae7c6573a097a2372a18210cf74ea
font_02_sfnt_off00017d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D55 10824 bytes
SHA-256: 4b249466e7c4256d8a713710b490434451286172c5efedc8ee2598d9295b8a5b

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