Malicious PDF — malware analysis report

Static analysis result for SHA-256 c97f573ad299232e…

MALICIOUS

PDF

107.3 KB Created: 2021-02-23 23:13:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 17b0c841ed3c321169f95f36ff01409f SHA-1: 6d0b333319a47dd5c0f74c3a28334e04e51dc6c4 SHA-256: c97f573ad299232e3982490fe80e5da7d5e8d545c8160b79f1a6be4bd6ac9e73
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a large number of external links, many of which are likely part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing or trojan delivery mechanism. The embedded JavaScript likely facilitates the redirection to malicious URLs or the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/123?utm_term=who+is+george+in+go+ask+alice PDF link annotation
    • http://faguduni.22web.org/family_tree_worksheet.pdfIn PDF document text
    • https://dipabuxirakilat.weebly.com/uploads/1/3/1/0/131071076/5370025.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/hdmidge/tornadoes_today_in_arkansas.pdfIn PDF document text
    • https://sunuzokelegawo.weebly.com/uploads/1/3/4/4/134476032/wakuxolefos.pdfIn PDF document text
    • https://nubiduxabegi.weebly.com/uploads/1/3/1/8/131871606/witeb.pdfIn PDF document text
    • https://zesijijonade.weebly.com/uploads/1/3/0/7/130776416/wubajutij_vopawupilesilu_vogizema_kamifurog.pdfIn PDF document text
    • https://pulolated.weebly.com/uploads/1/3/0/7/130740140/moganivowu_remexef_tedoje.pdfIn PDF document text
    • https://tirepululavapiw.weebly.com/uploads/1/3/4/5/134576363/vowirujuzapomisopuw.pdfIn PDF document text
    • https://gowumobajakexe.weebly.com/uploads/1/3/4/5/134585768/2ea2198.pdfIn PDF document text
    • https://xexonuza.weebly.com/uploads/1/3/4/3/134305788/nepimufafuz_xuwuwiguserexi_golilulululegap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/47198306969.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/does_piriformis_cause_muscle_spasms.pdfIn PDF document text
    • http://tufuripisaren.epizy.com/48525060965.pdfIn PDF document text
    • http://pavinudoj.epizy.com/90303511047.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/morenudabi.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/vorogijamidoni.pdfIn PDF document text
    • http://wirudulobaga.epizy.com/creative_cloud_desktop_app_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/physical_fitness_certificate_template.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://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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15090 5140 bytes
SHA-256: ccfe342e8bdea337b277a990a8996e3e1c54bf25397d9f9b343e46144d1bec96
font_01_sfnt_off00016215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16215 10880 bytes
SHA-256: 00a31bc3704e7c5a40dd7b87480fb6c273eb4d8507479a763c774b8848b0916d
font_02_sfnt_off0001877b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1877B 17004 bytes
SHA-256: 366f54d4628eb6737e3dfc08e69b3c817ffade08979a7f506a582e3f3b52c7f2

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