Malicious PDF — malware analysis report

Static analysis result for SHA-256 601e25867def5224…

MALICIOUS

PDF

72.2 KB Created: 2021-09-06 07:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5ce9caea150195cd1548ab599fbf5946 SHA-1: 6896aba2a2f9b703d694a25cf2fa55bdc3a98054 SHA-256: 601e25867def52243bec0b7b7aa5e1cffe6e6eed9bc2abeb571ab57fd5f9844c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a link farm designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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://synerhu.ru/uplcv?utm_term=fifo+inventory+method+pdf PDF link annotation
    • http://erpos.sk/data/files/rofukiwojakeredilinu.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160985ccaba7ff---funag.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/45508141867.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160adaa69d4a62---xuduwo.pdfIn PDF document text
    • http://digivideos.net/ckfinder/userfiles/files/reguvomatafufonunufuvekad.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/3316f6788718629ecbe322eb3433bb19/temapibizubi.pdfIn PDF document text
    • http://ropesadventure.com/d/files/nelajuzekubibunuf.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/9eaac53fa930682fac2ee67bc5230717/feguvukezewurumebosezavez.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/d2c30622365ce0f324ad9490b42c7ff1/34673381270.pdfIn PDF document text
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/62857582903.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/56900d5bbbfd878e687aef4bf0e12c3c/68971893959.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/c29e5a69e82cb98bdd9db211f2c52a6d/fowababopewus.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/59068050098.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075eb962004d---34814786235.pdfIn PDF document text
    • http://clearspace-design.com/CKEdit/upload/files/nasuzipokun.pdfIn PDF document text
    • http://atek-ent.com/upload/file/mafumufaxaxawumuxovonezo.pdfIn PDF document text
    • http://web68s.com/upload/files/zademiwadoso.pdfIn PDF document text
    • http://ehoron21.mn/uploads/files/29435479967.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/b9dfe820c53597b034d15456015ccba5/nariwixoramozuletuzu.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/euibme7c1ravucf3btaas9226o/36271732782.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/kulonekopinotudipaletipi.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1c58e9b9d---xugunebubodi.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/6d9af1bbce1b773d8d7023f2f85e988d/12843742909.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/8004f9bc151a710da7a3917e07b1296a/fisoxememuzamuzobep.pdfIn PDF document text
    • https://nguyenhungstone.com/uploads/image/files/14561278806.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/xadevidosobufotugikeduzim.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9C0 10544 bytes
SHA-256: 37aed59366e644686c08c40b842728262befa36673756494665fdc6fe20269b3
font_01_sfnt_off0000d18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18A 16564 bytes
SHA-256: 70f3eee6deb39fe3a4eef6fac76b89ce932f35ac6950480ae9c12eb0a7599fa5
font_02_sfnt_off0000fb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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