Malicious PDF — malware analysis report

Static analysis result for SHA-256 269a425401455e6c…

MALICIOUS

PDF

70.9 KB Created: 2021-06-27 01:16:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 6082e571f33065df663df28784c05fe6 SHA-1: 07bb825a3f8873ef7f5b9f1ee79d29f96ace7b2a SHA-256: 269a425401455e6c6c80fdc2f98d997c59f5c54a8e00d4a5d0fcd10e5f5ec199
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting. The presence of numerous unknown URLs suggests an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5dc358a18---fanamafifivegij.pdf In PDF document text
    • http://broeinest.org/ckfinder/userfiles/files/27358701205.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f234c5bfa1---89009609989.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec7dd707be---vemeravudivezivopanafo.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae0aca88d4---71483120800.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/c096345bbe364327bb65e08a92e5b270/vununigajamigera.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e81701e935dbf634d7594cc050bad722/31101055746.pdfIn PDF document text
    • http://clingac.es/d/files/lakerabubuxobabukijeb.pdfIn PDF document text
    • https://sunwayhk.com/louis/STARKGROUP/ckfinder/userfiles/files/wogetudon.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/wefemozulevegowowekezidi.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/74d716139698d4a004fcb66a3d076b72/43599752276.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/zerofanalixiwanow.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/j24u2rfsi1urmga1kp821l2bp8/38425399347.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/85a27c13b9f9a4b73a23f22a178b60d9/94385663777.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/5c7cef2eb6dce1cde5c21119d7d83219/13484846115.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/30558687351.pdfIn PDF document text
    • https://seerupit.dk/assens/file/59952926448.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/ppg7pun84k6aq7224sosbq98r8/11504355352.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609037335a1f8---ruwumufidosegowenatiwus.pdfIn PDF document text
    • https://www.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/ad6c36bf9bab2d566534bdb334a3ef01/romifomuxagukuki.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/a1581c57ae889e38aa066571f6f5af67/fawuwujibalepexutebix.pdfIn PDF document text
    • http://geodez.com/pliki/file/94834124582.pdfIn PDF document text
    • https://jambukuning.com/contents//files/garezasobevevenesami.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=tokyo+ghoul+s1+episode+1PDF 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_off0000b5f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5F9 10528 bytes
SHA-256: 2bbec2ea2d773db93d8a21a10765039ee2526340cc460d1dd43ae08eabbe85de
font_01_sfnt_off0000cdec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FE 15788 bytes
SHA-256: 70b402c8ff92a3044ea143d31c8b1877a088efabcc4c83d680a2dfad5514e572

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