Malicious PDF — malware analysis report

Static analysis result for SHA-256 0154fb9f851aded0…

MALICIOUS

PDF

80.0 KB Created: 2021-04-04 13:40:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 137caa18e41c019926410060529fdd38 SHA-1: d6d0ab916e66c894b85ddcdd070b2cbfa6f70828 SHA-256: 0154fb9f851aded00572bde0e649d4ad05ddd56c01c30eb39338a57c4dd32416
96 Risk Score

Malware Insights

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

The PDF file contains a URL that appears to be a lure for exam preparation materials, but the ML classifier and ClamAV detection indicate malicious intent. The embedded URL, https://resalured.ru/strik?utm_term=rita+mulcahy+pmp+exam+preparation, is likely part of a phishing or malware distribution scheme. No scripts were extracted, but the PDF structure and external URI heuristic suggest it's designed to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=rita+mulcahy+pmp+exam+preparation
    • http://dopogabijup.mywebcommunity.org/nisiwunexevubufu.pdf
    • https://cdn.sqhk.co/lididiregi/iijdice/3d_parallax_live_wallpaper_4k_backgrounds.pdf
    • http://jamotovoxut.mywebcommunity.org/islamic_books_download_bangla.pdf
    • http://tonevagewalilu.medianewsonline.com/miwubu.pdf
    • http://tamogulaganero.scienceontheweb.net/82812130375.pdf
    • http://ritixibetono.mygamesonline.org/51456656416.pdf
    • http://pidagenavuziw.mywebcommunity.org/list_of_english_adverbs_and_adjectives.pdf
    • https://cdn.sqhk.co/nitagalut/TgUxgf7/.pdf
    • http://dowakofevumamol.22web.org/ffxiv_astrologian_card_guide_shadowbringers.pdf
    • http://fupemagis.mywebcommunity.org/lufelu.pdf
    • http://milanomoda.site/556002052812daof.pdf
    • https://cdn.sqhk.co/pugepavofu/jjfibf0/viwutivibepaku.pdf
    • http://deflecfcvy.best/voxetenefolositani8zvja.pdf
    • http://xiweloju.22web.org/65687879393.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nigiragesowujow.epizy.com/51066401953.pdf
    • https://s3.amazonaws.com/punurum/taxolunoxopazobinesar.pdf
    • http://gofirog.epizy.com/gsecl_vidyut_sahayak_answer_key.pdf
    • http://vugugemo.atwebpages.com/pumpkin_carving_stencils_printable.pdf
    • https://s3.amazonaws.com/risisipajole/ch_7_tv_guide_perth.pdf
    • http://rujipezoj.epizy.com/english_grammar_teaching_books.pdf
    • https://s3.amazonaws.com/kuxegu/which_is_better_breville_or_cuisinart_toaster_oven.pdf
    • http://segurixuzek.myartsonline.com/26526269115.pdf
    • https://s3.amazonaws.com/ruzumeb/why_do_my_subwoofers_keep_cutting_out.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_off0000f48f.bin
b313ded0e6b0291e3e3591445a3ca2d1e230db0f9fa1a069a6171afd1c3c9cce
pdf-font-stream PDF embedded font (sfnt) at offset 0xF48F 5172 bytes
font_01_sfnt_off0001060b.bin
27635ad97466a0d67e93ee7f8a4acf95b8e1441dfb5234fdf080ca027d9c7c59
pdf-font-stream PDF embedded font (sfnt) at offset 0x1060B 13264 bytes