Malicious PDF — malware analysis report

Static analysis result for SHA-256 43b78c570023008e…

MALICIOUS

PDF

79.7 KB Created: 2021-04-05 03:23:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8dd126f8c1fca60a3e09020f8a56b88a SHA-1: 93a3663208da0401383be022794ca8ffb1ca2dc9 SHA-256: 43b78c570023008e266083f9fc9554b528fb91550fc593688aa58e7eab83f24a
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to 'seumenha.ru', which is likely used to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, appears to be related to a manual, suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wix?keyword=casio+w+756+manual+espa%25C3%25B1ol
    • http://life-news.tech/brutal_age_mod_apk_latest_versiondzua4.pdf
    • https://static.s123-cdn-static.com/uploads/4382960/normal_6003a7d62752f.pdf
    • https://static.s123-cdn-static.com/uploads/4383918/normal_6008ec6411d32.pdf
    • https://static.s123-cdn-static.com/uploads/4488135/normal_600625ffef195.pdf
    • https://cdn-cms.f-static.net/uploads/4383791/normal_60192e9b73787.pdf
    • http://cosmicgig.com/zoom_g1_four_acoustic_patchyjyu7.pdf
    • https://pafirolexorawu.weebly.com/uploads/1/3/4/6/134612045/2524508.pdf
    • https://duvogepemib.weebly.com/uploads/1/3/5/3/135315067/21d95a2.pdf
    • http://weraka.online/zivere4g546.pdf
    • https://cdn-cms.f-static.net/uploads/4411694/normal_60170b36cd7a0.pdf
    • https://lifexusubanipi.weebly.com/uploads/1/3/4/3/134377686/6649548.pdf
    • http://defi-bet.world/nuwave_pressure_cooker_recipes_pork_loinywonl.pdf
    • http://jusapp.club/director_report_business_review_samplelwhjj.pdf
    • https://cdn-cms.f-static.net/uploads/4403948/normal_604cf049872d1.pdf
    • https://cdn-cms.f-static.net/uploads/4368955/normal_602c8cf3813a0.pdf
    • http://italywow.space/what_is_self_confidence7pyw0.pdf
    • https://static.s123-cdn-static.com/uploads/4462056/normal_6001b8ca60e4c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fulosobezur/nataferore.pdf
    • https://s3.amazonaws.com/bejeseja/6015982188.pdf
    • https://s3.amazonaws.com/rabewiruzitewa/xudojejixirejove.pdf
    • https://s3.amazonaws.com/takateg/rosugedotipujetigogije.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_off0000f5e2.bin
78b5b9ec081a2ddfa8db93970ee157902ececec8f0babe8ff9a4b0ae92a30c31
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E2 5436 bytes
font_01_sfnt_off00010829.bin
70b32e3f9727563a29648b0d27c22e016f63ed5b36456a2352c7f41a15022041
pdf-font-stream PDF embedded font (sfnt) at offset 0x10829 12160 bytes