Malicious PDF — malware analysis report

Static analysis result for SHA-256 774d1ee65f9bdd85…

MALICIOUS

PDF

77.8 KB Created: 2021-09-04 00:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 60e9564bd1562380c6ebd3164f539ff8 SHA-1: 405b207be86b183622cb98d698b65b8d7fcf5364 SHA-256: 774d1ee65f9bdd85ec5309f9cedc6a676ded8fed24e2175750459ec92ecdab4c
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute further malicious content or phish users. The presence of multiple external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc93425d15---24256410185.pdf In PDF document text
    • http://veterani-pushkino.ru/userfiles/files/pazorapomonanagijo.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f41a4d3b824---81756979431.pdfIn PDF document text
    • http://galluccifaibano.it/userfiles/file/33905782937.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/47379028383.pdfIn PDF document text
    • https://bocrangsuthammy.vn/upload/files/bajajorozesabiroresaser.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/4f8fb22742e7f80d1e1a459d90d229b4/xisuposimu.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/9c3bea6deb8c15016c6deb06b1edfe75/41673492386.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/95782903842.pdfIn PDF document text
    • http://kapli74.ru/upload_picture/karazojonoxuvosebef.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607c920668afc---donomovusolifujibopusom.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/7f3gbqbol1uhj0gpf5mmkp7fs7/folugisogalorovirubugevi.pdfIn PDF document text
    • http://gfhs1978reunion.com/clients/56625/File/lejogifabali.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/zowadak.pdfIn PDF document text
    • http://hnkingdee.cn/Files/file/2021912330.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/viburekulo.pdfIn PDF document text
    • http://robbinsfamilyhealthcare.com/clients/2/2c/2c787fa606fc56c3a3a24dfc5409695f/File/robobatipuvasaroxezuwo.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/161255351e939f---rizopigotelutemivefazalow.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/gr0rhecejudbo678u6kvmphui2/72831628484.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/68540810462.pdfIn PDF document text
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/69843060723.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/fafuvazavule.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=change+default+pdf+viewer+to+bluebeamPDF 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_off0000cabf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCABF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e2d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D1 17356 bytes
SHA-256: 35934a3b5f9d36242e293d4eeeca402a9fa56c855824d9f997741e0f32cbdeb3
font_02_sfnt_off00010ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF6 11200 bytes
SHA-256: 0f26b9b51bd4539073487eeafcccfb69e1724b9d6cae57f1d5e17e175c99a404

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