Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ede5c8d95f82cf6…

MALICIOUS

PDF

85.3 KB Created: 2021-07-20 22:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a173bb91895cf76c088f01f64c5e4cbc SHA-1: bc9493db1d738c92828107db398c64e9dc539ed6 SHA-256: 6ede5c8d95f82cf67d3e11b561f51dccc3480b35c0f3acfd813d71001f5871d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress upload storage, suggesting it's used to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9528

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 http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4953985c8---kikaletunaje.pdf In PDF document text
    • http://asckhn.com/acskhn/userfiles/file/80085240498.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b75126c63cb---22689175103.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b5cd862a1ea---wusovi.pdfIn PDF document text
    • https://bimstudioinc.com/media/files/41278938414.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/6hpkavg2po9qj7396gtcj8kk77/vejixezexiritebomil.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/e0534c74155acc66b238e436d578fc04/57882476864.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/pavekuzuko.pdfIn PDF document text
    • https://htchninc.com/d/files/funikitad.pdfIn PDF document text
    • http://igigeothermal.jp/userfiles/file/poletuwanusop.pdfIn PDF document text
    • https://jlgardner.org/home/jlg/public_html/ckfinder/userfiles/files/65853951111.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/pigilazomukabuki.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b747335e319---37395317961.pdfIn PDF document text
    • https://giltmorestukko.hu/ckfinder/userfiles/files/32346426693.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/7c8hmgfr3qn502efv5qmk4f056/64887737434.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/7818293487.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/797501af10b8c51f4bee3d6879deb3d4/misizowudawetumugaj.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/9c1o39gv0jigdr7atug140ld4k/3522903965.pdfIn PDF document text
    • https://basalyemek.com/ckfinder/userfiles/files/92033176732.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c091329d1f9---47884393681.pdfIn PDF document text
    • https://eghamatkade.com/basefile/eghamatkadecom/files/85753708603.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/d7cp0tr0qhj6va4vhjfk7m1mi3/29198555209.pdfIn PDF document text
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/89976024503.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a4705d48c03---jovagekuzimepokufanesobu.pdfIn PDF document text
    • https://pharmalogindia.in/ckfinder/userfiles/files/jimilinalewowamefadukel.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6d290353ed---kewifawajuvajubupir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=the+butterfly+effect+3+castPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF728 10608 bytes
SHA-256: aa45ed591975a2b63c43883e2b0b40f536a404beeec355efb0db63cb35b0fb57
font_02_sfnt_off00010fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA5 18380 bytes
SHA-256: fd2aa518b4318701f9b81ffd7405a3208979773c61eb973248b84b3e4d063571
font_03_sfnt_off00013ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA9 1892 bytes
SHA-256: ef102cff93327c58b3ebcf89d19da8f10d5b864ebd65536be584a50cab6235f1