Malicious PDF — malware analysis report

Static analysis result for SHA-256 096018fc9299fafd…

MALICIOUS

PDF

83.0 KB Created: 2021-09-19 02:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8598b1d5efcd31c17e6c52420af4e6ff SHA-1: d4480c534d795473aff1dae95230459e6b4821f6 SHA-256: 096018fc9299fafdb10cdf70c1e4334f7927eb2b73ff70e47eef84e285ff8c9b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or link farms, suggesting an attempt to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://juentai.com/userfiles/files/zuvanekadakexar.pdf In PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/13526016935.pdfIn PDF document text
    • https://i-intelli.com/ckfinder/userfiles/files/47988084517.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/182fc3e04c3eeb95417dd18f3244e0db/kexobokikowijo.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202109101238332205.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/zavozokov.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/70902112393.pdfIn PDF document text
    • http://itfkarnataka.com/cvsprojects/SSK/Source/2.0.0/images/files/63127816403.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/xosaxolexebedovowaxexeka.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/82913265bdf9aa429e3744eb6c8713f0/gogizesituj.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f14560e868---zolujutogodafo.pdfIn PDF document text
    • http://chizclean.ru/files/fck/file/82735672773.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/24773067612.pdfIn PDF document text
    • https://izr.fr/files/nozukafexixikiwuj.pdfIn PDF document text
    • http://newo.ru/files/files/witonepijopetitavud.pdfIn PDF document text
    • http://wksx.top/images/userfiles/file/motelu.pdfIn PDF document text
    • http://bdsductri.com/upload/files/purusafunapebagerizugumaw.pdfIn PDF document text
    • http://gadkowski.pl/repository/filemanager/file/woporaxizigun.pdfIn PDF document text
    • http://justsayhi365.com/uploads/file/tojufavujepexeriz.pdfIn PDF document text
    • https://fontan-montag.ru/img/upload/57016275435.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/55238566257.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/34919072421.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/majebi.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/716b0cf4746320a0f2f1d78a9fd222e2/44923466703.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=the+end+of+the+f+world+graphic+novel+pdfPDF 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_off0000df2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2F 10844 bytes
SHA-256: 71797361198da0aada72ab5c310c5af955bf72d50f7581cbf3e77e115d3a56ca
font_01_sfnt_off0000f7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FA 17820 bytes
SHA-256: 6bf3a835bde4f54821b596eee9d3b67750db38d1aee9c889075340be5a4a5251
font_02_sfnt_off0001262c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1262C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1