Malicious PDF — malware analysis report

Static analysis result for SHA-256 15211b098278fc08…

MALICIOUS

PDF

206.9 KB Created: 2021-06-12 14:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c43e39a517b244b7cb0bd6bb33980fd2 SHA-1: efd310f501b6575922c388ee6f5e300e03d49a80 SHA-256: 15211b098278fc08a2772762a4e97a86adebb89865702ac764df77268ee94407
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many of which appear to be compromised WordPress upload directories, suggesting a distribution point for further malicious content. The document body, though heavily obfuscated, contains references to movie downloads, likely serving as a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8956

Heuristics 5

  • 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.
  • 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://philabc.ru/uplcv?utm_term=anniyan+movie+download+in+tamil PDF link annotation
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/03791a7a39c2055f52147b0f921b769b/18297821915.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/17838595877.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/94673856431.pdfIn PDF document text
    • http://staples1981.com/clients/b/ba/ba027a536d51c1d997ee76cae6dc9017/File/17415327239.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/pigalilolirexidedo.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/dhpkmjfee57mklqeohvq3agpg5/52983860606.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729d96d09d4---fonalog.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/vesenonotuluvakone.pdfIn PDF document text
    • http://alumcity.ru/userfiles/file/16035471108.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/99d7db9ab2325b2dc71378cd9992f5e7/24949862592.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16080f78d6187c---10551343547.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/1330358044.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079cec228a93---79965668311.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/e0aa5a4f8a500a7feebddc5e4aa3c3ec/85220747449.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/35902709821.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc209e9ec7---74170335328.pdfIn PDF document text
    • https://readandenjoy.ae/userfiles/files/47433547508.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002aa5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AA5A 4940 bytes
SHA-256: b1ca799ad10d7e987ff4ff83a30e8491d96644817e6ca57a9a2e8a04b6bcb346
font_01_sfnt_off0002bb30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BB30 11228 bytes
SHA-256: 55d35cca80117f685b7be34b80ad89a9d52994ceaa742ffa025357b3b19b12e9
font_02_sfnt_off0002d821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D821 12404 bytes
SHA-256: 331e712c9df068c47cfcd5edde647ce14d7c5d0ba2b723c6afe63bd0bcc64822
font_03_sfnt_off000301c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x301C3 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6
font_04_sfnt_off00031716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31716 5940 bytes
SHA-256: b4b3b03aab4f1bf104f6d1aa3f25cc6d3293adef75c85cbce3504a70ee1661d7