Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec2ee0e828394a16…

MALICIOUS

PDF

80.6 KB Created: 2021-09-18 23:53:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9d939f49519a3de697d0a802e0055676 SHA-1: a2059c434a9b2140a5c1048ecb3fb1766e35163e SHA-256: ec2ee0e828394a16e36be265d24815a61f7b75b6b6555b292985d74b76a4d59e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this is a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection or execution of further malicious content.

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
  • 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.
  • 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://coretry.ru/uplcv?utm_term=super+mario+run+old+version PDF link annotation
    • http://greece-ex.com/images/blog/file/juborovoxamu.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161423952c7f2f---38592979883.pdfIn PDF document text
    • https://ismart99.net/upload/files/vizadalozeg.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/51669780016.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/jupewetedet.pdfIn PDF document text
    • http://tomgiongvip.com/uploads/files/file/72036843706.pdfIn PDF document text
    • http://huefpdf.org/upload/file/5974287476.pdfIn PDF document text
    • https://acconpriti.com/ckfinder/userfiles/files/migegajanekeso.pdfIn PDF document text
    • http://mimpishiosatu.com/contents/files/gixomizovujave.pdfIn PDF document text
    • https://kominove-centrum.cz/media/files/file/69967961858.pdfIn PDF document text
    • https://forssh.com/userfiles/file/kowugukitemujimidusokuf.pdfIn PDF document text
    • http://uchid.com/uploads/file/6457859756.pdfIn PDF document text
    • http://myphamlulanjina.com/upload/files/muzoputaladikofib.pdfIn PDF document text
    • http://micruts.org/userfiles/file/68404702319.pdfIn PDF document text
    • https://al-wesam.com/userfiles/files/44685453156.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/18807685735.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/6213951568.pdfIn PDF document text
    • http://mweb.cz/images/file/xolukigi.pdfIn PDF document text
    • http://kargiskola.ge/myadmin/ckeditor/ckfinder/userfiles/files/wujexuvakonirosig.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/21810190275.pdfIn PDF document text
    • https://myshalewell.com/userfiles/file/gugumexiboruduk.pdfIn PDF document text
    • http://smartdeal.pl/files/upload/files/65484950940.pdfIn PDF document text
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/8281294551.pdfIn PDF document text
    • http://keletunderground.hu/images/uploaded_pics/file/2118361542.pdfIn 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://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_off0000d51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51F 18252 bytes
SHA-256: 88c15d1e424613aa840cf07934a859a05332d25a8853038ba9469b5ac4c4f0d9
font_01_sfnt_off0001045a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045A 10696 bytes
SHA-256: 57fce9b2048906c7b75d522c1f6d652a6080bcc8e131180714fb009444eaf2a6
font_02_sfnt_off00011cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1