Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ebf2cef339b213…

MALICIOUS

PDF

89.5 KB Created: 2021-07-25 05:35:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e93a0ab54375a9376e320580e44c25f5 SHA-1: a96d2fb0ddd9ad668a8fb8007136f86d88cf36d0 SHA-256: 01ebf2cef339b213eb52709c9c99cbd10e20b7474c5e50aebde009d3145d878f
196 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to compromised WordPress sites, likely intended to trick users into downloading malicious files disguised as software. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely provides instructions to decrypt a password-protected archive, a common tactic to bypass gateway security. ClamAV detection and ML classification confirm the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/2dbf6d188dcf85c380922fe0475f65d9/78238912824.pdf In PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/85241740586.pdfIn PDF document text
    • http://thuephotocopytaihanoi.com/upload/files/34378274616.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/14878327137.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/kaleguzezogufufetojipibe.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/45a428a47f39fd2232338ac43b39cc69/69243637824.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/qc8t9gjcs4oalr7i8fkou743v8/15998529888.pdfIn PDF document text
    • http://zavalinka.by/var/upload/file/sutezewamojapiwerova.pdfIn PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/15830759876.pdfIn PDF document text
    • http://momsgardenfoods.com/ckfinder/userfiles/files/76507521787.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210701192949.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/875d7ff62f3a948c23a3441ac5ac885a/35876523718.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bac9218c31f---rijolunaxifojas.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d35403ccdb9---91887841793.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f3d7ef8fc08---22999418632.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/1010319218.pdfIn PDF document text
    • http://cokhihoaiduc.com/uploads/files/88253690774.pdfIn PDF document text
    • http://arniuniversity.in/ci/userfiles/files/vapuzuwukobezanus.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/0adce4e20a7d57db173999fcd130819c/xalisorupesesimelijaf.pdfIn PDF document text
    • http://lws-realestate.com/userfiles/files/54714990952.pdfIn PDF document text
    • http://kcobafl.org/ckfinder/userfiles/files/xuvaxuvojatitujitebuzove.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=winrar+download+32+bits+windows+7+portugues+freePDF 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_off0000f4cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CD 18796 bytes
SHA-256: 5254543a66b7125b9d8d57d1911f7a5a4647c01253dd2765bc66d178925e3ff7
font_01_sfnt_off000123ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BE5 11336 bytes
SHA-256: 3022a44d47d24604608a62475edd9f781e9204b97f645970264919ad3d6009cf

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