Malicious PDF — malware analysis report

Static analysis result for SHA-256 c120373a818bed1e…

MALICIOUS

PDF

69.5 KB Created: 2021-09-19 03:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 06b110371c237b7ae85b6d6139cd1b0c SHA-1: 4c6f2efd758c55b55c2e8a3b59e99baa35518d79 SHA-256: c120373a818bed1e6506539d0b833eef60d243ed2dc9c430ebf9f370360b0088
166 Risk Score

Malware Insights

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

The PDF is identified as an image-only lure, a common tactic for phishing or malware distribution. It contains numerous external URIs, including one pointing to 'drafthe.ru', suggesting a redirection to a malicious site. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://drafthe.ru/uplcv?utm_term=download+game+ppsp+android PDF link annotation
    • http://orthodoxnews.us/file/vozom.pdfIn PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/zogexekiranak.pdfIn PDF document text
    • http://taxiluzern.ch/khurasan/userfiles/files/33315144222.pdfIn PDF document text
    • http://kvrhousing.com/uploads/42494559787.pdfIn PDF document text
    • http://ukkies.be/userfiles/file/zigukepuse.pdfIn PDF document text
    • http://bentleyplemtech.ru/userfiles/file/nawakewejapa.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614677cf315d9---77669102207.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/powumozidikegipase.pdfIn PDF document text
    • https://vinamex.info/uploads/news_file/mifot.pdfIn PDF document text
    • http://www.cda.org.hk/ckfinder/userfiles/files/49257532348.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613289b3922a2---radorufu.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210912003619.pdfIn PDF document text
    • http://dealershop.es/camarasegovia/userfiles/file/nalujunopoxuvowamejoladup.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/muwibure.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/zumoxugaruzajazivuxat.pdfIn PDF document text
    • https://terracell.info/images/file/zexazum.pdfIn PDF document text
    • http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/58008450142.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/21075853451.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/kimozesiridiwafutobevepi.pdfIn PDF document text
    • http://ejmk.com/ej/upload/files/zekokatitera.pdfIn PDF document text
    • http://gyermekhaz.hu/Content/site_images/files/51327172235.pdfIn PDF document text
    • http://fd-health.com/upload/ckeditor/files/zokigimokuxuwujitezezave.pdfIn PDF document text
    • https://tipresentoio.it/images/file/92199348393.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/10862263315.pdfIn PDF document text
    • http://cgmorenanews.com.br/ckfinder/userfiles/files/sanebi.pdfIn PDF document text
    • http://auksozvynas.lt/userfiles/file/72795329558.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_off0000b515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB515 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD27 14028 bytes
SHA-256: b64c1656b9771707f49498232969f2a76c415c528f4efd9b4fe943c5c8b7b1dc
font_02_sfnt_off0000efae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAE 10724 bytes
SHA-256: e3eab2ec0f06e0da5283b9acca99eef33260f4c74922ddb600d1245298a8b38c