Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac23b4fae5f4bca0…

MALICIOUS

PDF

79.6 KB Created: 2021-03-11 06:58:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 348fcd1a8d355d402f281f043a67d651 SHA-1: b2458d42672fb3b19886773c8dab902682a45e77 SHA-256: ac23b4fae5f4bca08775d7eac7e6ae6588d77e1c0fadb75eaa4621fc32d63240
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF format can embed JavaScript, and the presence of external URIs indicates an attempt to redirect the user to a malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jumiwimov.ru/award?keyword=bmj+vorsorgevollmacht+formular.+pdf
    • https://wokonupojelofa.weebly.com/uploads/1/3/5/3/135351156/gusavo_gekojalufi_xatemodifuz.pdf
    • https://midatapeb.weebly.com/uploads/1/3/1/0/131070166/vufuxuzidadi_diwomaxod_wunaniw.pdf
    • http://gatowixipeba.mywebcommunity.org/lelesabila.pdf
    • http://rat-red.space/608178839239xi1p.pdf
    • http://freshnatur.fun/96236243048vy7fy.pdf
    • https://cdn-cms.f-static.net/uploads/4446030/normal_6032d50418385.pdf
    • https://xoxajunun.weebly.com/uploads/1/3/4/3/134351876/57c65acb17.pdf
    • http://cashbackmoney.info/paxineswdt9r.pdf
    • https://rizedugo.weebly.com/uploads/1/3/1/4/131453818/gupaxu_gulupajadik.pdf
    • http://nout-prokat.website/zoridetizidudijnmxb.pdf
    • https://cdn-cms.f-static.net/uploads/4368742/normal_60496a7f76fe8.pdf
    • https://xapenivivafozeb.weebly.com/uploads/1/3/1/3/131379266/8772640.pdf
    • https://cdn-cms.f-static.net/uploads/4485301/normal_601fb778e7484.pdf
    • http://lakshmi-store.ru/58583157525fo0vr.pdf
    • https://zunitaxipef.weebly.com/uploads/1/3/1/3/131398356/josubozatafefitorex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://duvodix.myartsonline.com/wafewopamenegiwajal.pdf
    • http://fidalanono.myartsonline.com/acer_aspire_e5_specs_and_price.pdf
    • https://s3.amazonaws.com/wudibirewuduto/79826608644.pdf
    • https://s3.amazonaws.com/baritexovopa/jisizok.pdf
    • http://wazeniwemir.onlinewebshop.net/hp_5510_printer_not_printing_black.pdf
    • https://s3.amazonaws.com/tafogusegabomu/personal_finance_excel_spreadsheet.pdf
    • https://s3.amazonaws.com/jinabom/piagets_stages_of_moral_development.pdf
    • http://wotidupodugi.myartsonline.com/jon_duckett_html_and_css.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_off0000f7b6.bin
d0d1ab41e033cdd251a20db75d27f77240deae05e21b3c81b7903e03afe8b48c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B6 5788 bytes
font_01_sfnt_off00010b56.bin
eb040bbfd659e8f09e6c16c95ba0f5bf195e59438d1ed60757d414beebdd02b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B56 10912 bytes