Malicious PDF — malware analysis report

Static analysis result for SHA-256 6572f9ab3a3480cf…

MALICIOUS

PDF

116.5 KB Created: 2021-06-26 11:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b17dc5a96d7385538688b01073975806 SHA-1: b34e42a4a16b16a634e6c2c4a4f32f2c7f36f88c SHA-256: 6572f9ab3a3480cfd15deeb86d8d274ebb842ffb4e86998a19d5bd20b517712d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains embedded JavaScript, likely intended to redirect the user to external malicious sites or download further payloads. Several URLs extracted from the document point to compromised CMS upload directories, suggesting a pattern of hosting malicious files on vulnerable websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.
  • 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
  • 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://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/b970815fa8a1a8b9a79d8b100235e1f7/bogula.pdf
    • https://atamergranit.com/userfiles/file/21435785583.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/s6888i8k74cpdi3ronbqbse6su/38050855861.pdf
    • http://wang023spa.com/userfiles/202106file/2021061014450670554.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a200746b3---52938444480.pdf
    • http://w3-japan.com/js/upload/files/sekemukutebep.pdf
    • http://cnex.cc/images/blog//file/45936063475.pdf
    • http://ekotop.eu/userfiles/file/ravotojebuf.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160876db271dbc---16443082199.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad156f9d1a4---35083562645.pdf
    • http://mediaworld.pro/ckfinder/userfiles/files/31086655642.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16082cbde7f100---lusolijotoxipizisuk.pdf
    • http://beepost.vn/upload/userfiles/files/xivemik.pdf
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/90676209068.pdf
    • https://asiarsolutions.com/userfiles/file/barolenobawivimos.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16081ddaf23bf9---dorafebibanobafixelax.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/uj0l3gpe2k1e9250aop2l3e6gi/6915331991.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0d9f0c793---dowetabo.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079816f96720---82397947846.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b97393bcb4---91140348869.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7141a380de---garutozotigixanulaf.pdf
    • http://webdulich.com/js/ckfinder/userfiles/files/12150044652.pdf
    • http://lammensfilip.be/uploads/files/99210310116.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=child+of+promise+bible
    • 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_off0001686b.bin
033325a1c2af204b1fe5d24c38a3e1115603444661bb4000b2aa8692f4e98c5c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1686B 16752 bytes
font_01_sfnt_off000193c8.bin
826f158240082481c66500105fcc77b1568c2568d01440de846d0005c270090b
pdf-font-stream PDF embedded font (sfnt) at offset 0x193C8 10568 bytes
font_02_sfnt_off0001ab97.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB97 16792 bytes