Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9e9f992e9ade8cf…

MALICIOUS

PDF

87.9 KB Created: 2021-07-03 23:37:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0bcec0c3ba8660fcf099f68675ef3b49 SHA-1: bf78771668ec254aaf0790170f700656cc333bea SHA-256: d9e9f992e9ade8cf596b16952f3f723d18d04bab7174982062b38d7465d1fee6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites hosted on potentially compromised CMS uploads. The presence of numerous unknown URLs suggests an attempt to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949d9227eb3---22791137801.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5b4d0f99c---guzimuwik.pdf
    • http://agriturismofattorialucciano.it/ckfinder/userfiles/files/jobowuw.pdf
    • http://nicolalazzarotto.com/userfiles/files/30431105477.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/770c004d87d4911a2b1019fe5360b8da/16538426772.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ecb7b895b---gurazi.pdf
    • http://bnblspecialities.com/userfiles/files/bepawomebifakezef.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b63f09b2d19---53949598381.pdf
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/20494279124.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2f3c4ce77a---54526188871.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/n9nvlf73us6au269m6e02vjj64/fogozepagibekififal.pdf
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/44356450877.pdf
    • http://busanpc1.com/upload/fckeditor/file/bopugumofodimigedip.pdf
    • http://royalwedding.jp/images/blog//file/dedaxaja.pdf
    • https://mumegram.com/userfiles/file/daruziduti.pdf
    • https://suma.ca/upload/editor/file/vekituwexibo.pdf
    • https://asiabiru.com/contents//files/busuk.pdf
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/90cp05r8rgrt7aad3t582q8o94/sabelasusofutiranesedev.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/88st4cg5rf88b9ghpp05hsd0k5/54376004864.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4b87683d1---64811187785.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/dc264a82f27bbeb6052bec05835b6906/nibujuzujipetef.pdf
    • http://drjoecarver.com/clients/49355/File/90397527424.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/bgson3knlv664h55cd13jvfasr/70972321467.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/a8930bdc48d2b4331a2b01b2e17cd97b/36279617295.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16072a5b618c26---fagutaliliva.pdf
    • http://villa-carlshorst.de/sites/default/files/file/bawujifiriwumavip.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=knots+in+the+palm+of+your+hand
    • 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_off0000f2c8.bin
c5f743d9b1b9e52a3879c7cb262b3439bcbcb44845daad8e15c1b82f1888cb29
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C8 10968 bytes
font_01_sfnt_off00010c0b.bin
28951d132e003b23ef0d8a64c9e550c331ae60df974d48a81a6372954521307e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0B 17112 bytes
font_02_sfnt_off000138a1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x138A1 16792 bytes