Malicious PDF — malware analysis report

Static analysis result for SHA-256 516eb9dd67786dd9…

MALICIOUS

PDF

80.8 KB Created: 2021-09-22 13:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6229875ec38951b78ee1512d5cee6d5b SHA-1: cebce9ececc5bbf360fc44a207f82088e783cf41 SHA-256: 516eb9dd67786dd9b3540092dc52764eb24bdb17f18fca2e0a6612005ac82860
132 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised CMS uploads or disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are designed to host phishing content or distribute further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3497

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.
  • 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
  • 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://irlanc.ru/uplcv?utm_term=gta+5+premium+edition+apk PDF link annotation
    • http://salespate.com/userfiles/file/xonemefebobumolusesuruda.pdfIn PDF document text
    • http://infinijewelry.com/userfiles/file/zefumesawat.pdfIn PDF document text
    • https://tadimtursu.com/image/files/donijonegipazalegujusilej.pdfIn PDF document text
    • http://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/96764667863.pdfIn PDF document text
    • https://g-stampo.com/pics/pages/file/2812143357.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/0a61r530hhekd8teqbn2e0rb6s/47838198341.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/94543843137.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16138e8e0285d1---novawajodelepotojipaxijug.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/16450036182.pdfIn PDF document text
    • https://strefaokazji.pl/uploaded/file/68133466898.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/fc513ae4b81d4c2a2354b065610c7888/65539847129.pdfIn PDF document text
    • http://caffepontoni.com/uploads/file/36610962804.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/67640075093.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/087daf4772e83244caa0a4b58fce904f/70414296128.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/33543988401.pdfIn PDF document text
    • http://malabarisproducoes.com/arquivos/files/fikelugevofikobejizeke.pdfIn PDF document text
    • http://siciny.pl/userfiles/file/81359746642.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142053c3c6ad---88663826104.pdfIn PDF document text
    • http://thuocamakong.net/userfiles/image/file/vomujixiwebutetoduxi.pdfIn PDF document text
    • http://bn-biz.com/userData/board/file/wekinedip.pdfIn PDF document text
    • http://studiomilano.eu/userfiles/files/xizevu.pdfIn PDF document text
    • http://phunggia.biz/userfiles/file/pukevadarexodix.pdfIn PDF document text
    • http://wmc21.com/ckupload/files/75820696162.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/90661321577.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAF 10704 bytes
SHA-256: 2329c7099636412680f957a3f5c0b8a5631c352e470e5d16e2b27eff5695503d
font_01_sfnt_off0001074a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074A 18584 bytes
SHA-256: 35ef018e44efc6f8a7ad0c67ccdb07f779a631e2db83ba49462232b393143306

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