Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd41567395a82c7…

MALICIOUS

PDF

87.0 KB Created: 2021-06-28 04:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 43e2f186a9c0df9d425787d534a92c9e SHA-1: 1733053e4fc36ed6d7a78a2c91f0da510604ba79 SHA-256: afd41567395a82c789d5a4da7eee4877051d656a12a60fa8c87903d94f127f9c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload locations and other potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest it is designed to redirect users to phishing or malware download pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2b43f14a6---7718145332.pdf
    • http://ipceurope.eu/assets/file/fugonifuva.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1e053c5cf---pitij.pdf
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/28dd5dad6cbaa96a43dcc364ba413224/11703049338.pdf
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/15050231938.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/fb7c4a862fdfa2f468cebc73f06985ef/49387248153.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/6a652b74eef4ea2e73fc0b582caf5612/xuxomopisebejagel.pdf
    • http://agataklimowska.pl/userfiles/file/bepomofosiridogit.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/mfqh09mo8geo1kfol7c3419rss/pazavapifivaxepifapib.pdf
    • http://doyen.cc/images/upload/File/verukunetif.pdf
    • http://ztkammer.at/uploads/file/rirafifurezozisukeba.pdf
    • https://betenagro.com/sites/default/files/file/67191376477.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/e41isqsgk194emp767406d09sm/lolumuxolo.pdf
    • http://aire-limpio.com/img/editor/file/nibemetisorak.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608646c58a190---loripuxab.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4a5964fdb---59916033645.pdf
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608606fca32dd---dawipexaditutut.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2ab5d27de---2707659730.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bfafb4b9f88---vaxogowozezokejopariwalet.pdf
    • https://adasms.fr/userfiles/file/misegavegugivikozefavu.pdf
    • https://ascinfratech.com/clientprojects/trading/file/tibalojadotazatiminizaj.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5aa9a8e1bd77e431f7f4cbfb29ac7bb3/16506490920.pdf
    • http://landmanenterprises.com/clients/6/66/660ad4be7ac834282af30b44844c6003/File/43146005927.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/d6df7e34d03ec8994ae16a8aa3a68933/86972133935.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=cricket+noise+in+house
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/30e9c76075d9826e61591982ac1a64e0/toveb.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2f7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F7 16792 bytes
font_01_sfnt_off00010b0e.bin
9de4593c2ea1f4549778a9ca836890f964fb9573b3ab65b8eb4d6ff9f79205d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0E 10344 bytes
font_02_sfnt_off00012267.bin
9a9bc96c9c2d9bdd0b5239f893a4e3f1756e10f86337806e82a6c602ab8546c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12267 17208 bytes