Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f661210b7be248…

MALICIOUS

PDF

86.1 KB Created: 2021-07-24 23:26:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 32bb64f272eb317ccb681181b2d3c7b3 SHA-1: 9667f298d475ea2e016e418dbce202414a074836 SHA-256: 70f661210b7be2485eee874045b7847b59583694130ad4d625fd1b88d61d6784
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading a malicious file. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the structure and URL findings are sufficient to infer a download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://414movement.com/wp-content/plugins/super-forms/uploads/php/files/dc6a9d75e41874f9133e33a5d86d6875/zital.pdf
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/5437675e37c89f64e2f22ed246f2f0f0/16629091592.pdf
    • http://ehsclassof64.com/clients/b/bf/bfa5c4411462ceee4a19e543862d902c/File/baxavadafigusepizapenemu.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160a67635ddfa2---zomujajirexabo.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16086f16d4e13a---9311113332.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/31dc7a33f04f50820c29c61fceaf7f0b/77274893241.pdf
    • http://outspokenholland.com/userfiles/fckFile/20210516092418.pdf
    • https://elitstroycraft.ru/source/file/ravak.pdf
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/mijawijog.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160731cdbbc5ab---31508050862.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9c26910cf---soduribenaxuwa.pdf
    • http://cpgny.com/userfiles/files/46609983737.pdf
    • https://kopari.hu/files/file/48447728797.pdf
    • http://granite1962.com/clients/869125/File/79308834791.pdf
    • http://www.mustwalge.ee/data/content/files/61703346020.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607dcc4d3a0c0---2444845277.pdf
    • http://kartywspomnien.pl/uploads/assets/file/77556482032.pdf
    • http://stigstudiotecnico.it/userfiles/files/vafefo.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844703a0005---sosejufudokepotepipu.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/41fd425ad0830a280850330be97c623b/gatoj.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/ca96efa0a6b0340cff096bbf89dcb5d7/70508264056.pdf
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/ebbb37a51bb2648407f2c25cb5b22d4e/51896031869.pdf
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/22674255061.pdf
    • http://twothirdsmajority.us/clients/38522/File/14644459460.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=t%E1%BA%A3i+bleach+vs+naruto+cho+ios
    • 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_off0000eae7.bin
5074cb0fec6a33ae8f4045b332b79b15f8b5ce5b6f1747e5ef399b4ca25f8be4
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE7 10832 bytes
font_01_sfnt_off0001037e.bin
7ce9061d9c022326c791ef55269b8b9dbc18d3442a848c3af913c924d5e66990
pdf-font-stream PDF embedded font (sfnt) at offset 0x1037E 17240 bytes
font_02_sfnt_off0001309b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1309B 16792 bytes