Malicious PDF — malware analysis report

Static analysis result for SHA-256 38197ed4f4113919…

MALICIOUS

PDF

77.1 KB Created: 2021-10-05 19:47:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 705ebee6c30beeae56949cc9d78a9dae SHA-1: 605961475b5273e52de2645e68da9f9183eecedd SHA-256: 38197ed4f41139197d7c372c933f4e10ee52d2e621126050395ebfe4ead3eafb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains an embedded JavaScript stream and numerous external URIs, many of which are part of a link farm hosted on compromised or disposable domains. The embedded JavaScript and the nature of the URIs suggest an attempt to redirect the user to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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://allytemp.ru/uplcv?utm_term=dangal+movie+tamil+dubbed+download PDF link annotation
    • http://elcivan.com/admin/UserFiles/file/70208671445.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/47253262612.pdfIn PDF document text
    • https://siemreaptraveltours.com/userfiles/file/41122274712.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/8ucdtlt9guvrqioro7sd18gjkt/23076591547.pdfIn PDF document text
    • https://tndvn.com/js/ckfinder/userfiles/files/palawerejekitu.pdfIn PDF document text
    • http://unionnutritech.com/upload/files/38799376862.pdfIn PDF document text
    • https://frisch.ro/files/file/38144215778.pdfIn PDF document text
    • http://www.pantonerestauri.com/ckfinder/userfiles/files/72935780050.pdfIn PDF document text
    • http://hvezda-pardubice.cz/files/file/ritegiwijojujeji.pdfIn PDF document text
    • http://hengfengpaper.com/filespath/files/20211003203239.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16133c41e955cb---fodogon.pdfIn PDF document text
    • http://phutungototuanphat.com/img-tvdl/files/nirufebugiligeme.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c99a1538c7---67186389776.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/1528785321.pdfIn PDF document text
    • http://etcpremium.com/userfiles/files/58345975765.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/vulisodiniwaguseminuvego.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/921361630.pdfIn PDF document text
    • https://classykitchen.pl/web/uploads/files/12414779186.pdfIn PDF document text
    • http://4bx.pl/public/file/76441558724.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/03s47d6022rq123g7h5u5kombg/50829816627.pdfIn PDF document text
    • http://noithatmyhome.com/img/files/retesasadu.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1614dc587cdb06---pujup.pdfIn PDF document text
    • https://vibanghanoi.com/uploads/files/60373524679.pdfIn PDF document text
    • 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_off0000c927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC927 17576 bytes
SHA-256: 771d1264f18dd0a4ee993b079965fc213c6ec3535f0d06468da0ee08feebf403
font_01_sfnt_off0000f614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF614 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2B 10716 bytes
SHA-256: 13c62aab861910e2d7b7bf2ffbcd95abb14b650a775b30b59f984b87c019a711

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