Malicious PDF — malware analysis report

Static analysis result for SHA-256 a36bef8ccc186c89…

MALICIOUS

PDF

124.2 KB Created: 2021-08-17 01:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 84af1d499be5079d5c4b17a95cba6c04 SHA-1: a23606bd1ec71d7b671bd12c57ed8169d24bda4d SHA-256: a36bef8ccc186c89ad5da71a3592b60a632984016a70b101f53998c38e562f91
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. The file functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the presence of multiple external URIs and the 'link farm' heuristic strongly suggest a malicious intent to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://catamma.ru/uplcv?utm_term=divinity+original+sin+2+lohse+support+build PDF link annotation
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/161037fb63000b---bupedexa.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/14631698936.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/90305270779.pdfIn PDF document text
    • https://ryokanclub.com/FileData/ckfinder/files/20210720_3A6F31A2FB8577A3.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/29f29d4c34431bc8e1a630a0c0c30fbb/laxarosovutedijozan.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e8ae7cce6---28310960289.pdfIn PDF document text
    • https://naves.cz/res/file/sesawexime.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080db7663b58---sokawuzogitasusotovotat.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/33939817265.pdfIn PDF document text
    • http://iberryhomemade.com/userfiles/files/681518703.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/5c28bece0a159daacbcd473f1040581d/mebikujagoxe.pdfIn PDF document text
    • https://masihpt1.com/contents//files/lukudexi.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/26722980891.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/galunatepi.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/bixazevalitejoloja.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/0mgfks8pni8blan9hhgmquhct3/ramukariwel.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/teduxejixawurokeginaxage.pdfIn PDF document text
    • http://lakes77.com/clients/47041/File/35141970489.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/a857ffbc5962fa32a138a49f55d71adf/xifebak.pdfIn PDF document text
    • http://vhshf.de/File/38737871179.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3fcdc0af4---tafebezodikarogexatav.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccfbc25eb7---34092464439.pdfIn PDF document text
    • https://360mart.net/uploads/files/66694906575.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e769f609e45f2638ab665f45607f44d5/fuxejujesosokisanitar.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/71919996487.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001697f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1697F 11212 bytes
SHA-256: f1a88b083ce8a7db57031910e75856fbe86647bc29a6dd166ecf3b244b3cded2
font_01_sfnt_off0001834c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1834C 18720 bytes
SHA-256: 63eafdc3825cd034196daed112f9583beb8b6ed28ebeeab5e632bf99249b9496
font_02_sfnt_off0001b463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B463 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001cc74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CC74 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd

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