Malicious PDF — malware analysis report

Static analysis result for SHA-256 be202ef7efe59e4f…

MALICIOUS

PDF

69.1 KB Created: 2021-09-25 18:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cb7190462ba35a4d10a70e482aaca951 SHA-1: 017ef96e82d72e7393a99a9514fcf942832cfb75 SHA-256: be202ef7efe59e4f5995b2845812cacf3b39a77fe1e23b6539fa181385de4d42
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high probability of malicious intent. The PDF contains numerous embedded URLs, with one heuristic specifically flagging it as a link farm on disposable hosting, suggesting an attempt to manipulate search engine results or distribute further malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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
  • 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://wakesup.org/userfiles/file/99965280562.pdf In PDF document text
    • http://visoda.lt/ckfinder/userfiles/files/lusolirumupivujuzigivow.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/97309498373d78064f04e6f1a6777426/57613695077.pdfIn PDF document text
    • http://dotbamboo.com/file_media/file_image/file/9412409544.pdfIn PDF document text
    • http://monarchiaerembolt.hu/tmp/vilali.pdfIn PDF document text
    • http://123podkrovie.sk/editor_uploads/files/43973042555.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/59632716374.pdfIn PDF document text
    • http://paliukenas.lt/i/File/vamediwada.pdfIn PDF document text
    • http://zenithmetals.com/files/581036970.pdfIn PDF document text
    • https://penzion-palice.cz/content/zodajixiliwigubudonag.pdfIn PDF document text
    • https://www.geya99.com/ckfinder/userfiles/files/55721558131.pdfIn PDF document text
    • https://cosonnguyenthanh.vn/webroot/userfiles/files/dujejubegevumolelizifo.pdfIn PDF document text
    • https://voyageaventurenepal.com/upload/files/nosunaropezufirulik.pdfIn PDF document text
    • https://learnrkbin.jugalbandiresearch.com/ckfinder/userfiles/files/bijinimivuwor.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/37841752792.pdfIn PDF document text
    • https://karlschool.org/uploads/files/202109140229464625.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/9f09d01c25be7214ae4d9b2a1f9285fa/wadolokerobekolewe.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/juzelavubanig.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/bezoxo.pdfIn PDF document text
    • https://triosms.com/userfiles/file/59333319997.pdfIn PDF document text
    • http://asqcert.net/files/files/41609099497.pdfIn PDF document text
    • http://forti.in/userfiles/file/54754406678.pdfIn PDF document text
    • http://mwcapital.net/ckfinder/userfiles/files/nujezuvirorubatuwelazezi.pdfIn PDF document text
    • https://x-software.cz/data/file/rerinovazaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=best+app+to+hack+wifi+for+androidPDF 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_off0000ae7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE7C 10904 bytes
SHA-256: 073c6b5da8e415c0d6b3887ff8c98fb4e77760fdeef8e9cc2ceb5a3013017416
font_01_sfnt_off0000c7ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7CA 14980 bytes
SHA-256: c10f53147464d91eaad9b125d725511261e9d40272577cbc52ec8b6c2bfd08ed
font_02_sfnt_off0000ed00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1