Malicious PDF — malware analysis report

Static analysis result for SHA-256 654dd866b30831c9…

MALICIOUS

PDF

80.5 KB Created: 2021-08-14 17:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: dbf8e2220d086147fcad9ca4762a1e41 SHA-1: aac9698618c4e64e5bf6b0f608fbf24bb51ecc6c SHA-256: 654dd866b30831c9545eb48b9ff6b33900d869e863344a1debf888ab47e76799
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution lure. The presence of multiple PDF link farm heuristics indicates an attempt to direct users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://camile.vn/wp-content/plugins/super-forms/uploads/php/files/kdss5okno5ocbn6i0kepgrrvhd/tijab.pdf In PDF document text
    • http://caratow.eu/userfiles/file/46100112707.pdfIn PDF document text
    • http://vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/jomafejerozuvoxubek.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/sanidiwuxarogi.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6ea9c8539---99849003533.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/kojasavozufamipavafemeset.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/96ec768f07ac9a3012f2b809daa25aca/26350069776.pdfIn PDF document text
    • http://thuonghieutoancau.vn/uploads/files/tunugolowipiseginu.pdfIn PDF document text
    • http://betamarin.com/images/media/files/jozutakonolenugerirawutal.pdfIn PDF document text
    • http://gtshotel.it/images/file/sugumun.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/jp4kiht4emqoplgt8e4thoqjs1/tenaparugik.pdfIn PDF document text
    • https://cedria.es/DOCUMENTS/FotosFCKEditor/file/kakinupiwar.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/taxizojuwub.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/7ba7fa8ad55ae6a6603b1654f618385f/46585590782.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/54567656252.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160758ff2b5341---rukeminexitubomuguvim.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/81466825354.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210623215451659.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8f33148510---muzifuwedemuwanaxibumiko.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4e2624072---benabavaduda.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/30332088910.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607852d5369bc---fodikapirate.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/2d707b759c3077da33093eac8364bc51/90130385900.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/s76ptnds76sdn306c3kkpdh4a0/17703828812.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=english+speaking+skills+assessmentPDF 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_off0000d7f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F1 10552 bytes
SHA-256: d4ed5805cba09dceb530aac8e6366897c14b3d438ce4cc8ab0c45a55abf86db6
font_01_sfnt_off0000efc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC1 17068 bytes
SHA-256: 3a8a5a1eb2ebf4c32aab50f02887e4b8f09fae45f8d7f5a5246f2b51210f9163
font_02_sfnt_off00011c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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