Malicious PDF — malware analysis report

Static analysis result for SHA-256 97035613ad99e475…

MALICIOUS

PDF

72.4 KB Created: 2021-09-02 09:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8aeac79eff372924d7a5905def3422eb SHA-1: 8cb68edcdec1f169a5d20d77474f432a45fcfa80 SHA-256: 97035613ad99e4757baa67f8db571059829fbde62aa56f22f45e3202cddf0912
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS upload directories, suggesting a phishing or malware distribution campaign. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, indicating the document is designed to funnel users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://crewmak.ru/uplcv?utm_term=aval+bank+online PDF link annotation
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/liritopugewefolofabode.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16076e038e2e75---10015605380.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/48297595968.pdfIn PDF document text
    • https://yz-yongzhong.com/upfiles/editor/files/lezodi.pdfIn PDF document text
    • https://havanic.com/cache/fck_files/file/2109795913.pdfIn PDF document text
    • http://pb-book.com/user_file/file/3945729182.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/texabiwufegujudig.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cda22833bd3---27799486257.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f28bb5f267---daxerawujodemesi.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a26fef43c---tujokoliferepekuxitapexo.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1609b186bbfeae---mositil.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de6473bb51e---rurexekoz.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/81821546664.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f8db51466---putovawafuwafo.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/nozolomanivojemotiwile.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/murezukiputofuvukoxinadu.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca2c5a090c---masudavigenufe.pdfIn PDF document text
    • http://folientastaturen.pl/_data/file/50266930512.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/49434485355.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/99299964700.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/mavusoweleveredov.pdfIn PDF document text
    • http://kdbelektrotechniek.nl/uploads/file/88585034721.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/32115528414.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/mosujud.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_off0000bb14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d32b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32B 10016 bytes
SHA-256: 9fc7c0e3b37fa2dd2cec27e33e2db00f656950197b219568043913dbbbc49886
font_02_sfnt_off0000e980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE980 16692 bytes
SHA-256: 520b17ba29b89552312527655fd6d58bd3c431d889d592693bde0503e3c63150

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