Malicious PDF — malware analysis report

Static analysis result for SHA-256 13a7972a08d36a95…

MALICIOUS

PDF

76.5 KB Created: 2021-07-06 14:43:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fae1e9bc56d2984c3c073200c4aee333 SHA-1: 3e6e3b7b8536331c6fbb240cc46a52cf259d1f4c SHA-256: 13a7972a08d36a95627461ba5630e9b21ea1e9708a0d0df166b3c3a78444fc3b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress uploads or disposable hosting, indicating a link farm designed to obscure the final destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://garageanything.com/js/upload/files/jizitofedobozanezosaj.pdf In PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/73897872923.pdfIn PDF document text
    • https://inoxquochoang.com/app/webroot/files/images/pages/files/42048562698.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6a2e3f0a8d86a6baaed5265f29925b16/vubekugadawawedizaniwob.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/lusamol.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/misudazeguzeduker.pdfIn PDF document text
    • http://smart-ventures.ch/upload/Editor_Images/files/levisololefagutuj.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/5603432406.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/v84tcndthrdcc0afg282ekg5in/kuwitixamad.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba83086ac2d---91094312528.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b45f25cba---bujumefukugefetometawin.pdfIn PDF document text
    • https://itacademyindia.com/ckfinder/userfiles/files/59213156427.pdfIn PDF document text
    • http://gmkms.net/upfile_editor/2021/files/wanikos.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/b7088f7cdc8e4ef2034e2c2b104e4990/toseno.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767aeb0fb6d---29627074432.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b061b70a209---30051843344.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/59188747278.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/kigopa.pdfIn PDF document text
    • http://polkovnik.su/upload/file/zinazitomazi.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/wiwupisenirukiz.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/11742747249.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16098b5474eb37---23263468369.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=the+compound+containing+both+ionic+and+covalent+bond+isPDF link annotation
    • 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_off0000c601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC601 17368 bytes
SHA-256: 586339085833e01ed3a746e2ed7fc28e832924f3d3cafd607428f7588c8b05e8
font_01_sfnt_off0000f316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF316 11132 bytes
SHA-256: 609850095055111c3fae0552de8d117b1306ab81f8bd84bf4b46cb9388375342
font_02_sfnt_off00010c7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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