Malicious PDF — malware analysis report

Static analysis result for SHA-256 93140f917643b775…

MALICIOUS

PDF

87.0 KB Created: 2021-09-02 13:25:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9e470aca1ed7cb88abfe40b8643b06f5 SHA-1: 53251880f04e896312f5ef1e842a92428f1d7d57 SHA-256: 93140f917643b775b198a3ce10d7442e02edc00b42fcd13d8445124de01b0b47
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and link farm nature suggest it's designed to lure users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://temple.mo/userfiles/file/losufuvawuju.pdf In PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/851eb31ef1502396c0174a9ef6c8252b/todefitezadobowaduko.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/kqvv32t6cibpum0i95inb9di63/nekevininojojoziwezif.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/17092543794.pdfIn PDF document text
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/37134574123.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac0f051528---siwemonefakuvopovado.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/61549489053.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/3e0eccf8826ecba869c1a32959036a45/73207978536.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa13c55bfcc---bifuredutagepoxovenev.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/fa72d47a3394c2b83c4c2c0ba38fd88e/tuwurukezobedunototupej.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b3340a810e6---36967561485.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/zepefekefanumagigesimepa.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/51b8e1553e6afa868422fab565619322/wodovaz.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/d58c187c6a845610c168e00e944d7ac6/49605888057.pdfIn PDF document text
    • https://shidoremicrosys.com/media/310818911.pdfIn PDF document text
    • https://turkihale.com/userfiles/file/67126424287.pdfIn PDF document text
    • https://excore.hu/ckfinder/userfiles/files/73616087926.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/puvilelop.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/vefodivomuvuneromad.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608085b7ea67f---19970628729.pdfIn PDF document text
    • http://tchid.net/userfiles/file/zopixedekerusaza.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ebd65c975---16058622594.pdfIn PDF document text
    • https://thuaphatlaihanoi.net/uploads/files/gijuzomusewotuxozuvulir.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/23605668286.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=homonyms+homographs+pdfPDF 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_off0000eb70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB70 10680 bytes
SHA-256: e9348dccf1ce70eb8532aa22052f6266f50fe0785683f19ccd4ca64b47581229
font_01_sfnt_off00010377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10377 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B89 19636 bytes
SHA-256: 08622e2d0123d8eab412965d662cf26efe3b951dc8f43e44be7d71de1eb2a372

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