Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ddfbfb024160db…

MALICIOUS

PDF

85.1 KB Created: 2021-08-20 18:21:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 099974d592da74f9f0303ce5fef5f93a SHA-1: 961fbaaf14af17a34b3ac122df6ef8fa8ef4d790 SHA-256: 08ddfbfb024160db5e2fb6d20f0be45dfe2eee29920bf86169b7c2504bd794cc
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The embedded URLs are designed to redirect users to potentially malicious content, leveraging compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b46a6b42e63---takesap.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d3c53e0e7f8---63561917662.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d666d1c4f53---93592104212.pdf
    • http://valeneighbors.com/userimages/vedikujim.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086847c2bdd4---60165376073.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/7sngn68a527t26ti65vljdtotl/38135059461.pdf
    • http://www.kilincsweb.hu/fileok/file/23596657678.pdf
    • http://scales-center.com/shop/fck_file/file/68634041170.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/slf5h96csiq1mhitv9mhu6nl6f/44488958342.pdf
    • http://behtarinekhodetbash.com/files/files/2569784768.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/t5riqogf95t9440s9ap5ur4mm4/juduvisopeganevubasavubi.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607195df62cd0---73016834295.pdf
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/af5e5bacdf008d1f7ff07f1d08deaacd/75044816009.pdf
    • http://talleresjpg.es/img/file/26562110189.pdf
    • https://binhvi.com/upload/files/xininovedisuzokasumoxawit.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090a78e6bbc2---deradokefebejevapebafalu.pdf
    • https://anukulagrotech.com/userfiles/file/xewofipoxa.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/418ac6360d8883cdf7567f2785b5a40d/14162144473.pdf
    • http://bmsorganica.com/userfiles/file/90896773458.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e0fa79e8e6de82c4f0700d52932d5c47/zumesif.pdf
    • http://worldcar.jp/userfiles/files/xonomuxogixexefisupo.pdf
    • http://ackerviewguesthouse.com/userfiles/file/52397802470.pdf
    • http://dansecyr.ca/pdf/file/34532185561.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+to+get+minecraft+bedrock+on+macbook
    • 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_off0000e7b6.bin
3d4ccb97cd21871f132ed411ac383f1f5a30b23eba13846a6a7ee5662ea67870
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B6 17548 bytes
font_01_sfnt_off00011498.bin
e02f53a24fb31d266e41b09098059a9335827ce887029c9114d9ee59846c4770
pdf-font-stream PDF embedded font (sfnt) at offset 0x11498 10916 bytes
font_02_sfnt_off00012db0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB0 16792 bytes