Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d7420591f3e246d…

MALICIOUS

PDF

81.8 KB Created: 2021-09-04 13:05:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d721c566a32f60c18d251d29a3f9e85c SHA-1: babce7b7dd7ad1eccd191d02f38bc78a4a052a8a SHA-256: 5d7420591f3e246d9ab3c01063fdf996d4a5c0c1c63e71af0f2ded12837857b7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c308e048731---55818065768.pdf In PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/b6d0968d1d43ad480286cd0513192131/45257087267.pdfIn PDF document text
    • https://elmawadah.com/userfiles/file/38646097813.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813821360cf---babubuzevux.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/waveposesatiwozobat.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/gapuvegajatido.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/a1a0c55758e8b96d9842553cbed259db/walawunezezi.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/lefitazanunimek.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/4a2ec622fbb0e96f7b26524b7ea5e041/winepewosoligixuzimu.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/00u43887umdcg4f35tsfnqut30/latamamijaxirininafevig.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759be09ef79---77765150388.pdfIn PDF document text
    • https://domilot.com/uploader/files/52916856631.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/nimalibonaxanoluvaru.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1610ae3233f62f---67315766059.pdfIn PDF document text
    • http://magyaringatlanadatbazis.hu/dev/_user/file/remenu.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/19816915435.pdfIn PDF document text
    • https://q-web.ro/wp-content/plugins/super-forms/uploads/php/files/uloj29vharrpbg2qpegj8mgn2i/ziwafizavetaza.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/aq6mvb2231p4dk80tj7628nu99/lulejojan.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/74e38ae4c050f429e7ae1ce16dd30ce5/rasilup.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/89854066784.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/74612969411.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/lokitipulajafaximu.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b3d23d71b---fokuked.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/5669281768.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=tnpsc+group+2+syllabus+2018+pdf+in+englishPDF 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_off0000d82e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82E 17780 bytes
SHA-256: 232a28cbc03e531eb8031c46c2a0fa10e07a5a3f365936d2b4c4e5f8eb43aa7b
font_01_sfnt_off00010667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10667 11620 bytes
SHA-256: e0af06de57ea695d98ff3165cea35e4821ee08de0321dbbdabd35c68f0cffba5
font_02_sfnt_off000121a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1