Malicious PDF — malware analysis report

Static analysis result for SHA-256 0afc3b467dc81908…

MALICIOUS

PDF

70.1 KB Created: 2021-09-14 12:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: c73152168dc4eea2faf5abe057b47ff7 SHA-1: f244a8b85f34648a1fe850488576649f7052b48c SHA-256: 0afc3b467dc819082b3f0b3f5f0da3ebcc61794bb8479a9ff6b8dec024ba8198
126 Risk Score

Malware Insights

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

The file was detected by ClamAV as a phishing trojan and flagged by an ML classifier. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a phishing or malware distribution scheme. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://crysiq.ru/uplcv?utm_term=what+is+basic+daydreams+app PDF link annotation
    • http://exosportsante.fr/ckfinder/userfiles/files/54245955078.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/remevuguvija.pdfIn PDF document text
    • http://mobilahomedesign.com/userfiles/files/ziken.pdfIn PDF document text
    • https://mfdesign.hu/files/file/29257635997.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210901105814.pdfIn PDF document text
    • https://aicpwdosaeast.com/ckfinder/userfiles/files/warugelizexobapusewusel.pdfIn PDF document text
    • http://www.syrahresources.com.au/application/third_party/ckfinder/userfiles/files/fotomozafikuzanumutasabi.pdfIn PDF document text
    • https://himalayanespresso.com/espresso_ckfinder/userfiles/files/84121545362.pdfIn PDF document text
    • https://oazapiekna.com/zdjecia/fck/file/34421767389.pdfIn PDF document text
    • http://togclick.com/media/userFckfiles/file/65823503077.pdfIn PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/bawubajosezosi.pdfIn PDF document text
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/guxifavasoluxofifejade.pdfIn PDF document text
    • https://zifu-tech.com/app/webroot/userfiles/files/87138255281.pdfIn PDF document text
    • http://nanouklid.cz/upload/file/jemamibutejilagakaxadoj.pdfIn PDF document text
    • http://xn----otbbfbbknchz.xn--p1ai/sadm_files/17517149037.pdfIn PDF document text
    • https://pensionradvanice.cz/res/file/9964520147.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/vazobupiro.pdfIn PDF document text
    • https://grupa-energia.pl/attachments/file/vegorulajusiwob.pdfIn PDF document text
    • http://zuche0551.com/upload/file/suzafagujorexololade.pdfIn PDF document text
    • https://keongracun.org/contents/files/vogoso.pdfIn PDF document text
    • https://tipresentoio.it/images/file/41330819426.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_off0000b2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE7 10756 bytes
SHA-256: 3b88c8e182df110d38669f626faa08dbd1de1afffb0fbb39d226022669f3d22b
font_02_sfnt_off0000e37f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37F 15636 bytes
SHA-256: 89908915479b03d2593b730577e072d9210d98c5b76891e7d103cab8ba0ac16f

Open this report in the interactive analyzer, or submit your own file for analysis.