Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eab38beb26f8ee2…

MALICIOUS

PDF

88.5 KB Created: 2021-02-19 00:33:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: cf6229112477cd47accea19a2e0bbe60 SHA-1: 335371a5fb7713bd10e0bae5b1e9a38b4e6a860c SHA-256: 4eab38beb26f8ee24e45d762747f1f0e1995be149a5e791b6c6cd93fe9c2a058
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'seumenha.ru', suggesting a phishing or redirection attempt. The document body, though heavily obfuscated, contains text that appears to be a lure, possibly related to religious phrases, which is a common tactic in social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=as+miseric%25C3%25B3rdias+do+senhor+se+renovam+todos+os+dias PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4491945/normal_5ffc49f23528d.pdfIn PDF document text
    • https://bagobizofenagex.weebly.com/uploads/1/3/4/7/134767931/zujesev_vugugi_feranedu.pdfIn PDF document text
    • https://nefosedinipal.weebly.com/uploads/1/3/4/6/134698739/6210189.pdfIn PDF document text
    • https://bifugojatomawak.weebly.com/uploads/1/3/1/4/131437093/fizigaguwuboga-wumifajokufabiw-migaduku-suxetipewedom.pdfIn PDF document text
    • http://balewezekowesab.iblogger.org/30085438648.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484641/normal_600ab426d976a.pdfIn PDF document text
    • http://bijatutolime.iblogger.org/59160864893.pdfIn PDF document text
    • http://paradusafe.iblogger.org/ccna_security_chapter_1_exam_answers.pdfIn PDF document text
    • http://tudiweva.22web.org/xazipuzabipuguxusiku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426814/normal_601f40cd21d0b.pdfIn PDF document text
    • http://miwodenexiz.iblogger.org/year_end_bonus_2018_for_teachers_guidelines.pdfIn PDF document text
    • https://falojabuvo.weebly.com/uploads/1/3/4/7/134774067/noxikogolage_xagitakub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372740/normal_5fed78bc2dd5c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tezogaxexinaga.rf.gd/rhetorical_analysis_essay_sample.pdfIn PDF document text
    • http://xebizeluzifavi.rf.gd/cloverleaf_sparkling_answer.pdfIn PDF document text
    • http://gevorewububew.epizy.com/78360147480.pdfIn PDF document text
    • http://komivarutu.epizy.com/lurizusanod.pdfIn PDF document text
    • http://texavit.epizy.com/bhola_hai_bhandari_ringtone_pagalworld._com.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE689 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off0000f770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF770 5332 bytes
SHA-256: e4e65e7b2fb4a6ea01d236adf7e6c90fcbe12abd6cfe1b938e99189772670c47
font_02_sfnt_off00010923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10923 1692 bytes
SHA-256: dd9dd108fdb47b2157c8faa8545c9ecc60501ad66ecf44fa6b13185b49f91c09
font_03_sfnt_off000111a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A7 12964 bytes
SHA-256: c4ca8d69326ec2d6d11960ed70f721e0f1df12b620f414fefaad095ec3a213ad
font_04_sfnt_off000139b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139B5 16544 bytes
SHA-256: 1f6e54fbcd715714bb73b5727992771a5c6d61b1c4c870d0ec6ef503381c9a66