Malicious PDF — malware analysis report

Static analysis result for SHA-256 a47e9f10144fa1e3…

MALICIOUS

PDF

78.3 KB Created: 2021-08-19 06:38:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: ae1a33a63da3787e6e707229777cf13f SHA-1: f2c2de87c8674c08f216952699575650f397ac88 SHA-256: a47e9f10144fa1e37407c195edb6dc94f17dac773a668e0b8eab3a0da7470643
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS upload storage and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the heuristic firings and URL analysis point to a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://pistant.ru/uplcv?utm_term=what+size+deck+belt+does+a+troy+bilt+pony+take PDF link annotation
    • http://kowalstwwo.pl/public/cms//images/file/veruvawadak.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871d2c0cf41---26890579093.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/43466496563.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/63393587372.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/1168006000.pdfIn PDF document text
    • http://sunil.kr/uploadfile/fckeditor/file/xefilezirifopezagozex.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/nbqhjpcmnbulo9jve8ntpqmg7q/56906240871.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/16071e990e80f8---28673837894.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/6e73f58d11944fbfa434771bdd577a54/61992314331.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd03c339b8---poveguzawuwa.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/eqva92ljmlq4mkc5mfhlbp2mt4/kenenopa.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/afd8635c869e2bfe0954e2516a25d25f/budaporo.pdfIn PDF document text
    • http://sonarkella.com/userfiles/file/77622591123.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/ligefilagede.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160f0802b04e68---pimojusip.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/45988304890.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/zodadafijal.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070270883603---75583470726.pdfIn PDF document text
    • https://sportuna.be/ckfinder/userfiles/files/tokeka.pdfIn PDF document text
    • http://top1np.com/ckfinder/userfiles/files/31901452211.pdfIn PDF document text
    • http://mtcongnghiepxanh.com/upload/fckimagesfile/jikerifaxasolesovifezeba.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_off0000ce7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE7F 16632 bytes
SHA-256: c0c8f1149abeab1cbc483b1e6c0dac7125b8c3c97dbe623208ab693cd9d0cab2
font_01_sfnt_off0000f9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11216 11012 bytes
SHA-256: 9d09d5900073e7699e5aa48a6ccd9253fd813362ea21104a0b23439a9fbbedf4

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