Malicious PDF — malware analysis report

Static analysis result for SHA-256 a264dc6f8fad54c7…

MALICIOUS

PDF

73.7 KB Created: 2021-07-08 02:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: c36ba5b7ece2bc61a5eed9de3660f00e SHA-1: d2adc9092b0a6b25ab1e47734f1d16ff45d06a84 SHA-256: a264dc6f8fad54c7ef7cfe17b7e8495e4a902e1bc50ae96f24aa6396f50371d9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to external sites, some of which are hosted on compromised WordPress installations. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8323

Heuristics 5

  • 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
  • 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://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8464f7d29c9c62043dc41e66dbebd128/lelebugivopogaxamizumeb.pdf In PDF document text
    • https://gaziemirkentkonseyi.com/upload/files/wusozubigozorugosoxitok.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/b6taqk9sfmlcc92m5e1k1h3d65/ledawariwexikupesozigopu.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085f2ef538e0---fafiremeziwufopenojeda.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093285c88d18---57572510200.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/dd35c594bad30e2ba6ecddb9e63a411d/dasudusimeve.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e099a7d2b6---27326586546.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/lafezeg.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/puxonajerevap.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/c3d679cd703c5b00fc57a3419e3759c1/nozamopanodedilarife.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/92219098381.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c776de66d7d---86575771488.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/5ck711aa31qj9lstsq05d9etcd/tanurapipikeno.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/0i9o9ml8r6hvqb0i1bldkqjlq6/wobabivemedetuposulo.pdfIn PDF document text
    • http://laulumaja.fi/ckfinder/userfiles/files/gevuxuwezesoxebek.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c52c9661f52---91687287460.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bf99bd75692---govaloni.pdfIn PDF document text
    • https://trickapotisk.cz/webpagebuilder/ckfinder/userfiles/files/fubipepepifigazidi.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/12284983370.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/cmlj606e6debehnlvvttav0rhg/dizewu.pdfIn PDF document text
    • http://belst.by/upload/file/54103067129.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/jalegow.pdfIn PDF document text
    • http://chanakol.com/ckfinder/userfiles/files/20251088187.pdfIn PDF document text
    • http://cuspsurgeons.com/userfiles/file/vazenobifetiwug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=deputy+principal+interview+questions+and+answers+south+africaPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1