Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d39b8710f4ddaf…

MALICIOUS

PDF

74.8 KB Created: 2021-03-11 17:15:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f22669a7cfdd3f45696f05adf6ef8057 SHA-1: 73b0ad571fea385516905d1e1adf412d699cf264 SHA-256: e4d39b8710f4ddaf5050f4c6bbf54ba1512ce8331dcabba08f85c5e2cfcc789a
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that points to a suspicious domain, likely intended for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into navigating to a malicious site, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/award?keyword=employee+notice+letter+sample+pdf
    • http://uplrezina.site/how_to_play_shark_mania_gameliu0h.pdf
    • https://cdn-cms.f-static.net/uploads/4478146/normal_60384efbc8adc.pdf
    • http://jushq.pro/subway_sandwiches_menu_canadagw62c.pdf
    • https://cdn-cms.f-static.net/uploads/4416331/normal_60462f263013b.pdf
    • http://sukujemegamog.22web.org/jilunuvitiso.pdf
    • http://bepufuz.22web.org/gaxefidadurezemoker.pdf
    • https://static.s123-cdn-static.com/uploads/4481528/normal_5fc828c97f7ba.pdf
    • http://fajutixosisi.22web.org/black_panther_wallpaper_hd.pdf
    • http://mozujana.22web.org/ruvaziberagikuj.pdf
    • http://mozovurezet.iblogger.org/wizab.pdf
    • http://resikixi.iblogger.org/dasixorefixexas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3f4b9b14-cf29-4f3d-961f-665c6294cfbf/44037113108.pdf
    • http://xarigezosuwa.rf.gd/canyons_resort_ski_report.pdf
    • https://uploads.strikinglycdn.com/files/b529f739-36e1-463a-95f1-9ea6f25a8333/what_multiplication_equals_308.pdf
    • https://uploads.strikinglycdn.com/files/e037677f-567d-4006-ae9a-76f5003424df/schwinn_airdyne_pro_owners_manual.pdf
    • http://fajubumejuxuful.rf.gd/ed_rosenthal_zero_tolerance_during_flowering.pdf
    • https://uploads.strikinglycdn.com/files/56fb5ec5-6aaf-4030-863f-2419a139b3c0/mipenaga.pdf
    • http://dokedupaguxo.rf.gd/97245812736.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7a7.bin
984549070782831db1ed25271832db5c87e3d9826ef3338115a23d93ea6eea7f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A7 5360 bytes
font_01_sfnt_off0000f9d7.bin
4fd3cea14ae30e335878767ff2380230c301c141050425171540687fc18618bb
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D7 10472 bytes