Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f23586d1874697…

MALICIOUS

PDF

92.8 KB Created: 2021-08-05 20:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 41be38aac0d77acd845d21df7b256396 SHA-1: 395ec82187b54caa2899f3383f81606017e0a06b SHA-256: a0f23586d1874697f557156b3d155ca8fd5c7f416dbfcf3d3172788bcd37aea4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or trojan delivery mechanism. The document functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. The presence of external URIs and link farm heuristics suggests an attempt to redirect users to malicious sites, potentially for credential harvesting or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 6

  • 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.
  • 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=participe+pass%C3%A9+exercices+cm2 PDF link annotation
    • https://vannordenvastgoed.nl/userfiles/file/viwovawoxowigunorujawaziv.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f07d787c59---86311927418.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/dedepijozigixofosowa.pdfIn PDF document text
    • http://djapm.com/userfiles/file/pimobilubuxebo.pdfIn PDF document text
    • http://ieeepes-thailand.org/app/webroot/files/files/18862137671.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c31664545da---83265897087.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/pomaku.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/38ab4ab62b513824b6e465196a567415/50695244231.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/453c917907c836aa273df06cc05a56de/jipojovevufopamixe.pdfIn PDF document text
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/6dfa3428730f29f00a581b9c38d965b1/84773196486.pdfIn PDF document text
    • http://cutskytools.com/d/files/20967406447.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/91313435973.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081140b53f81---nededudivove.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cca68ef0c9---witogof.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608168c8cb747---75599020927.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/vasuwofabusoxusamizifisaw.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/4800803296.pdfIn PDF document text
    • https://giustofiori.it/file/kulomopor.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/89876854891.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/567afab246af8dcf1d93e77dccd4f0f1/77735903100.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/dagotapabowot.pdfIn PDF document text
    • http://samtle.net/ckupload/files/vutuwumofixabes.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/m0bditbf0c5qas9b3la6rga0mr/22279589957.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/72137658108.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_off0000eb93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB93 16144 bytes
SHA-256: 7384f78f7eee0a7747af6aa54f6a012ae917b773c3daf511a94379393b43df11
font_01_sfnt_off0001011d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011D 10640 bytes
SHA-256: 8db696f110c9c00f8dcd4ca00693561f8aa5cd2fefdd433bb3bb4f41c941c745
font_02_sfnt_off0001194e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194E 19756 bytes
SHA-256: a1c43807b52aa8d7b123b1e829208ada979c2bbd4a074b57bca5a01f19783a7e
font_03_sfnt_off00014b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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