Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce52a4af066f3c3d…

MALICIOUS

PDF

85.0 KB Created: 2021-07-02 04:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f06ff770b1516748b2c00ddde6fcf0f1 SHA-1: d3c1d4416679a53548c1392adde107d885f0bdfa SHA-256: ce52a4af066f3c3d256f9604f7ac48927dd679a744f40618a00226aac27eedad
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://garglob.ru/uplcv?utm_term=types+of+formulary
    • https://zegabilisim.com/calisma2/files/uploads/sezevenoralubekakutotaf.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/i92h574do2un7r096fs4cvaf50/4352058951.pdf
    • https://bomberosdenavarra.com/userfiles_nexo/files/suripafepivivavut.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b4dea7d91---61117516229.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5e66b1c2f---nosomizuloki.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/v06n9b2nrb2tvll0o4mp86jm5l/22391772862.pdf
    • http://yuha.be/_files/file/38231289657.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b331e19bf4d---22880885428.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/df33f430a5e380daa6bcf3287ec6263b/88517460582.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/e1a7d1f2b0f52592daa54419e8f8886f/35527188334.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/dc2f86cd88e6637ce658fd2aa1954207/tepedixojolusaz.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/3540d5f6582e8787c3116b89061837b4/wekuduvifosovokeg.pdf
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/jagmprgtuiev67fco382df1to5/66522531413.pdf
    • http://bjsprt.com/uploadfile/file///2021051817432397.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607deb882b5ef---32053666522.pdf
    • http://doktor-okonski.pl/uploadimg/file/10053504091.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160945b5da4063---40545743419.pdf
    • http://flemingfamilies.org/clients/8/8a/8af36a28baf44bfc7b8a7004fb4eaede/File/gelud.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608deae6f2399---27259783987.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608511a58a43c---jogipasidiwat.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f111f17e4---gopudoz.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d19122254---93093225349.pdf
    • https://lasanisports.com/files/pesopefanasewusemoliba.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/ae87ce85994f34d60517161dff7fb8fc/gaxasobomelivudasotet.pdf
    • 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_off0000ea7d.bin
ce392a256c66fc17a28e4b4cf125407cef37358850311a582011d06a8ff50815
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7D 10404 bytes
font_01_sfnt_off00010219.bin
a5fb33617147fd571d634e1557ff85cbe1b014fa09bdd88a71c7a71c79305b1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10219 17124 bytes
font_02_sfnt_off00012ec6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC6 16792 bytes