Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a057f0be6a05f81…

MALICIOUS

PDF

89.2 KB Created: 2021-06-27 14:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: c9e2e566e4b28cd1ca9f696784420355 SHA-1: b9ae3e03887fc24adb98f7bf2d684eca9060d068 SHA-256: 3a057f0be6a05f81105397531a693c48a0c02f3c4aedf40d366e51aa9b807b65
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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=fundamentals+of+thermodynamics+solution+manual PDF link annotation
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae43c847779---zetofu.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/59808793464.pdfIn PDF document text
    • http://seksdagen.nl/userfiles/file/62676416112.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/ps3vejnsjims39mu4gbjpsf5qj/1003890845.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ihcjkmcgfu862od57upsi69hj0/menepasabasemug.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/88214507763.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/54928650758.pdfIn PDF document text
    • https://noddy.nu/images/file/motanapudosilalododexu.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/tosazewobajixejeruzikedo.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090e119f3405---45471585391.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/63fcbb720bc21f350fd87d9935432f76/dijatexijuzidujivorute.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/b5b7c8305a257a068a0045095d9ce75e/jitanamipiv.pdfIn PDF document text
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/ladekeb.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d54e78652---petaxuxaxawifof.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/depoxojowifawirabekuserik.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/dixuro.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce7c6dd666---82438567559.pdfIn PDF document text
    • http://ketoanaca.com/uploads/image/files/22929432439.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2fc4e31b89---68439499130.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606d869778686---pifuxufuruboxam.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/27688753980.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/9d61712884afe20ff5525296bbfc7587/99053115521.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/7e768e97fce155ac7388b3e8d9e62b28/52916735589.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_off0000f90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90A 10932 bytes
SHA-256: cd6c254fa3dbd3289ec377fad4c49f125ef2ddbb3aedeb993f5fb3f719e32d07
font_01_sfnt_off00011233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11233 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A45 17340 bytes
SHA-256: 308dd1972ba8af4845abab75338e9d581ddb1075d49b19a9ff96762d56c38b88

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