PDF malware analysis — malicious · bfa383f498bb06e4

MALICIOUS

PDF

86.7 KB Created: 2021-08-23 14:12:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: ec89d23b7e7deb1eb0a5c8b977fbc306 SHA-1: 95290fca98e7a1151453aa6a2e015f4de18b994d SHA-256: bfa383f498bb06e4c1da5b751a20b956e1b04b52aae405a1ed2ff0ccda2c1d20

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is a PDF containing embedded JavaScript, which is a common technique for exploiting vulnerabilities or redirecting users. Several heuristics indicate the presence of link farms and compromised CMS uploads, suggesting the document is part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9957

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 http://petraifevronii.ru/ckfinder/userfiles/files/dukexavukituzuze.pdf In PDF document text
- http://kapelski.pl/userfiles/file/43418236669.pdfIn PDF document text
- https://ancoraeducacion.com/images/72430500952.pdfIn PDF document text
- https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/7e0178c5730197b8bf7247bedb737d7d/rukalemu.pdfIn PDF document text
- https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1606cef41ab2c9---bepidejujowubejufilunov.pdfIn PDF document text
- http://bitite.lv/media/txt/122/file/vemekor.pdfIn PDF document text
- http://sklepjola.pl/userfiles/file/3930935157.pdfIn PDF document text
- https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/a30edefe168a368f5153e849dde990bc/mosunugovelunejalozenufu.pdfIn PDF document text
- http://riph.pl/userfiles/file/vitujibaxebiwawezim.pdfIn PDF document text
- http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160831eee50791---pakife.pdfIn PDF document text
- http://nawooelcs.com/upload/userfiles/2021/08/files/210811114836.pdfIn PDF document text
- https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/32fcd0cf0badfcf942dfaacba2feea3c/14195265273.pdfIn PDF document text
- http://fredericjean.net/oplusco/file/bowevemela.pdfIn PDF document text
- http://carrozzeriabosini.net/userfiles/files/68143423587.pdfIn PDF document text
- http://wchs65.org/clients/b/bb/bb65574a37642f7fe3135935df861e67/File/93740922804.pdfIn PDF document text
- http://gunjanjain.com/app/webroot/js/uploads/files/vajimejibosa.pdfIn PDF document text
- http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611feb56c2d2b---6497907005.pdfIn PDF document text
- http://arnold-sitter.com/CKEdit/upload/files/75935392409.pdfIn PDF document text
- http://peaceinsrilanka.lk/userfiles/file/11666454847.pdfIn PDF document text
- https://ketex.com/trcgp/ckfinder/userfiles/files/27033882357.pdfIn PDF document text
- https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/c28d0757d67087d995bb234afafaf7da/gojalufewudod.pdfIn PDF document text
- http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee8863c9295---morepesujanowefikobegi.pdfIn PDF document text
- http://curry-box-deluxe.de/userfiles/file/4925425669.pdfIn PDF document text
- http://canevinclassof70.com/clients/6/6b/6b8b8ee0d314e59372afbcb75100d768/File/90280201676.pdfIn PDF document text
- http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c817c1ef9b---23801154421.pdfIn PDF document text
- http://haithuanphat.com/uploads/files/bodupokeziditadawikuranek.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=silver+state+credit+unionPDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000efbb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFBB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000107d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107D2	10604 bytes
SHA-256: `e758bdf5484f8e637238ecc57974b4dc2a9ad6b8bc2f180a06d6330363c26f28`
`font_02_sfnt_off00012029.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12029	16600 bytes
SHA-256: `f7b84d8f2b2b3742e6fa20d81c52024387843023962874f998bbff380b9594ba`

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