Malicious PDF — malware analysis report

Static analysis result for SHA-256 589d66172190a82f…

MALICIOUS

PDF

84.6 KB Created: 2021-09-16 07:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f0d3fa0390727823487d639ac48a1247 SHA-1: aa9f2572e0602bb7e40dbed287dde118e52fdd5c SHA-256: 589d66172190a82fbd48e28fe8b4e431707dedf69eee9027bacf8a954bb28a76
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload storage, indicative of a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://macjiboter.macjahisa.si/files/file/sirobuxijisinexega.pdf
    • http://akicgiyim.com/userfiles/file/35052126180.pdf
    • https://planet-pvc.com/upload/files/manop.pdf
    • http://vdavloeren.be/userfiles/files/43741745279.pdf
    • https://pvesc.vn/uploaded/file/99779461008.pdf
    • http://headrepublic.pl/images/files/80977335289.pdf
    • http://hindustanadvancedsolution.com/t/tutorfirm/uploads/ck/files/jawisewalaxas.pdf
    • https://aristi-trap.com/upload/users/files/87454528038.pdf
    • http://mzch.pl/userfiles/file/54096998008.pdf
    • https://www.bramfordgc.co.uk/ckfinder/userfiles/files/badezofuxikomavibogetob.pdf
    • http://sjhrz.com/images/upload/File/pubezosefidozafudo.pdf
    • http://tandprotheses.com/ckfinder/userfiles/files/tizokumiwewuvorevusun.pdf
    • http://dobrejaja.com/Upload/file/tazen.pdf
    • http://studiotecnicomaglio.it/userfiles/files/83915252177.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613414d577209---29913089895.pdf
    • http://arniestribu.com/campannas/file/gadotebewowixotupoboz.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16141b7872d221---86253656114.pdf
    • http://cesarrodarte.com/userfiles/file/74027714007.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613583d9e270d---93931530322.pdf
    • http://progettogeometra.it/userfiles/files/90865373398.pdf
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/66124182163.pdf
    • https://godahoian.com/app/webroot/upload/files/23726320243.pdf
    • https://juniorclublivorno.com/sitonews/images_upload/files/99523603403.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/l7cg9m0nvcb8uo0t4ff8snpqik/27107459766.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=datepicker+date+range+example
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2df.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DF 16792 bytes
font_01_sfnt_off0000faf6.bin
9e3fbb10abf60852ec3ccf5acc70b6fc0cc497d70e37e92ef2d87856dc432d9d
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF6 10764 bytes
font_02_sfnt_off00011381.bin
3241396e07246cbd487f8d94faa54205b3e70a16c22368986ca209772f1a798c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11381 18400 bytes