Malicious PDF — malware analysis report

Static analysis result for SHA-256 c45feacbbd7d1727…

MALICIOUS

PDF

92.2 KB Created: 2021-06-29 21:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3166116087083f75bb04d11707460495 SHA-1: 9ea68840b02e6f40e214e02ea3481ecb77d99960 SHA-256: c45feacbbd7d17276a99890b5046eb5a43733b37421781fc3ad4271ac6f945cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/73f907552d286ee8e26fa65fad5edb42/noxifebogapasa.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/1c6da9dc798a9074d998714c9a25c413/rugamaxusedomobexasumop.pdf
    • http://myjobcareer.net/userfiles/file/2021062304320473499.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3fc866dc8---bamij.pdf
    • https://ryokanclub.com/FileData/ckfinder/files/20210620_6BF1ABD9AA7B9A50.pdf
    • https://tongdaidoanhnghiep.com/app/webroot/upload/files/bagaluxet.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083a6c08ffec---rojazupoxa.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/08c93f6f6417ce9df1a2cb95fbf34a1a/20112415557.pdf
    • http://cooper1972.com/clients/b/b4/b451ebb09e7e0345645526f893d9a49e/File/zuropowivotuvoliwamufon.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9f8f420f6---76280986984.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/smekqdt5jo16o5h4bksr9k3mkr/15170566239.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bff2ac01c27---78908060843.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16089ae2049784---zisonijikobuxowaba.pdf
    • https://fizjolech.pl/userfiles/file/setaxejunovo.pdf
    • https://artasedanasingaraja.com/uploadfck/file/49948314631.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/3479e373b9840f9fb1d5a64451f3e689/8897670094.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608476981901d---delavezukonoxil.pdf
    • https://aljazeerahpetroleum.ae/userfiles/files/taxiwagalojemuve.pdf
    • http://xinyaoqiye.com/upload_fck/file/2021-6-15/20210615192856610142.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed06a021e8---47761700092.pdf
    • http://cnpair.com/userfiles/file/91115070287.pdf
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/viloved.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=if+acid+is+splashed+on+your+skin
    • 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_off00010584.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10584 16792 bytes
font_01_sfnt_off00011d9b.bin
5aa15c1b604f0b90884c70d6927a3f73bb9333542ffc641aae70c12d4d4a3029
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D9B 10876 bytes
font_02_sfnt_off000136a6.bin
7a6807e5710c4b87db733d098760f83b93bcca24c4891dd7593c6638fbaff5b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x136A6 17292 bytes