Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f7c4639bfaa3f4…

MALICIOUS

PDF

76.1 KB Created: 2021-03-18 19:52:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1c49e9768366d29e51aa3dec82befe2 SHA-1: e92b89cd3a80708b1c203da234a92dd2627b4c68 SHA-256: e0f7c4639bfaa3f4e80052228ca52fd14b145101e723c98d1bb40fc20014c7cb
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, with a specific detection of 'Pdf.Phishing.Trojan'. It contains an embedded URL pointing to 'https://xezojetit.ru/wix?keyword=polygon+area+and+perimeter+worksheet', which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, contains text related to a 'polygon area and perimeter worksheet', suggesting a lure.

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://xezojetit.ru/wix?keyword=polygon+area+and+perimeter+worksheet
    • https://cdn-cms.f-static.net/uploads/4386851/normal_60242227ee52e.pdf
    • http://hiziryigit.online/738246741221yezk.pdf
    • http://g2am2e.xyz/memenekademitetiguh2wrm.pdf
    • http://55571.ru/vobetunegaxazuwowevebezas5re3q.pdf
    • http://tcerkovniekupola.space/is_the_militia_act_of_1792_still_valid6767u.pdf
    • http://matras-24.ru/campbell_biology_8th_edition_citationnwds3.pdf
    • http://creditscorefix.info/recompensas_local_guide_google_mapsca1qc.pdf
    • https://static.s123-cdn-static.com/uploads/4479916/normal_5fc7730b185b1.pdf
    • http://zalavsky.ru/lupomakeviveruxilofhjpp6.pdf
    • https://cdn-cms.f-static.net/uploads/4467571/normal_604349acac0fa.pdf
    • https://cdn-cms.f-static.net/uploads/4412761/normal_602a110ac6614.pdf
    • https://static.s123-cdn-static.com/uploads/4485809/normal_5fee730f54791.pdf
    • http://fewemika.66ghz.com/21_cfr_part_11_compliance_guidelines.pdf
    • http://trysoda.club/90782945990me2zg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://bororatofidapuw.epizy.com/editable_certificate_template.pdf
    • http://fovatuda.rf.gd/57376811916.pdf
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_90db785694d44bb087c57ae620dcc484.pdf?index=true
    • https://2aa0b900-127f-4603-a19a-6a731d3c9eb1.filesusr.com/ugd/5eaffa_0f0eebc9bb0f40baa4bbf387be07dc0a.pdf?index=true
    • https://69a7f268-727d-4112-ba4f-a3538cc856be.filesusr.com/ugd/9a0d60_d4349690b6864ef0acb0fe90d02f14ab.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dde1.bin
d9be30eb2eaf31fae2676b59689e7156f8798c073bb038d01f435005a8d4a060
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE1 5420 bytes
font_01_sfnt_off0000f02d.bin
82d9724d1fc097f1e7cfe379a8ec3ebc66c87ecdfdc283ceb8236d4097ab1ecf
pdf-font-stream PDF embedded font (sfnt) at offset 0xF02D 10704 bytes
font_02_sfnt_off00011493.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11493 4324 bytes