Malicious PDF — malware analysis report

Static analysis result for SHA-256 94b97eb0193f564f…

MALICIOUS

PDF

80.5 KB Created: 2021-02-25 07:11:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 31a9c80b32ba966e426cf984b39bb5d2 SHA-1: f293fd48536792f573beaf28244ef9bfa90daf72 SHA-256: 94b97eb0193f564ff6670e5a246c05571ee0f5a3766f9f9b5c554097dc0f041a
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 a site that appears to be a redirector for malicious content. The document body, though heavily obfuscated, suggests a lure related to home improvement, likely to disguise the malicious intent of directing users to external, potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/strik?utm_term=how+to+get+textured+paint+off+walls PDF link annotation
    • http://present-mag.ru/belituwirlblj.pdfIn PDF document text
    • https://cdn.sqhk.co/purorelaz/aKBjehf/kebanapevozafetufizuzume.pdfIn PDF document text
    • https://mixutexevegov.weebly.com/uploads/1/3/4/7/134706804/2434564.pdfIn PDF document text
    • https://vefavufarexuba.weebly.com/uploads/1/3/4/3/134315694/5d3101ea9.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/administracion_de_medicamentos_por_via_intramuscular_ppt.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/xowogugubenoseta.pdfIn PDF document text
    • http://doweryklkq.space/missile_wars_minecraft_servero6k5x.pdfIn PDF document text
    • https://bapumuper.weebly.com/uploads/1/3/1/1/131164114/fewoxozi.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/giivBhc/18430175876.pdfIn PDF document text
    • http://geesecam.com/kawupomiminalezokuvule9lzm.pdfIn PDF document text
    • https://luzatewuxajexi.weebly.com/uploads/1/3/4/2/134265782/9873457.pdfIn PDF document text
    • https://cdn.sqhk.co/gotirawuz/IqJOicx/nokaminuvilozarosi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wujodibu/depupupejodut.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/tobabov.pdfIn PDF document text
    • http://roxegut.rf.gd/kung_fu_panda_3_li.pdfIn PDF document text
    • http://fetopenatafef.rf.gd/aadukalam_movie_cut_songs.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/was_the_3rd_estate_started_french_revolution_and_wrote_1st_constitution.pdfIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/arjun_r_meda_status_video.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/xitotufopesifaniloziv.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF136 5212 bytes
SHA-256: b70e50c4583c8da4fab64a22ffc657c260f9748ec4724f299d699beba6830a06
font_01_sfnt_off00010318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10318 10380 bytes
SHA-256: 0f97aa89cb2318339e865d738e0247753aaafa16d6b4bca1ae1185c1eca36d95
font_02_sfnt_off0001265b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1265B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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