Malicious PDF — malware analysis report

Static analysis result for SHA-256 b66b743f4345985b…

MALICIOUS

PDF

74.1 KB Created: 2021-02-26 17:46:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7386314050646fe183c97716048ebcd5 SHA-1: db8f3679af840b6633d2711858c668a765474c28 SHA-256: b66b743f4345985b105daecadc2d978d78609654a5fd28d433cb7d46934b5059
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 external URIs, many pointing to disposable hosting, and the document body, though heavily obfuscated, appears to be a lure related to car battery life. The presence of external links suggests an attempt to redirect the user to malicious websites for further exploitation.

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=2014+toyota+camry+hybrid+battery+life PDF link annotation
    • https://cdn.sqhk.co/xolovagi/gd1ctja/vomonizapidaxomoroluzole.pdfIn PDF document text
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/wedufadofemit.pdfIn PDF document text
    • https://cdn.sqhk.co/besawevij/jgg7tia/nintendo_switch_console_for_sale.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/83054021304.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/how_much_does_a_semi_mechanic_make.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476427/normal_5fc5bd1ce731e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401703/normal_5fd7a7abc9fe8.pdfIn PDF document text
    • https://losuwigawoje.weebly.com/uploads/1/3/5/3/135304717/32599.pdfIn PDF document text
    • https://cdn.sqhk.co/gazejuruni/gjjfjjh/59547982596.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/mcgraw_hill_connect_answers_anatomy.pdfIn PDF document text
    • http://ziwivazud.onlinewebshop.net/duraflame_3d_navy_infrared_electric_fireplace_stove_with_remote_control.pdfIn PDF document text
    • http://sajomapujozokux.onlinewebshop.net/89903706795.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/error_on_your_credit_report.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/cambridge_empower_b1_answer_key.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F3 5644 bytes
SHA-256: d5e5c080bcb47bc65a23f382a9b47bfc63c405e67a71a6d2cc694c9cc4680694
font_01_sfnt_off0000f705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF705 10692 bytes
SHA-256: 48a9f3143422af8318e6060c1ec0a2d4a4dad6bb8b84e8fe0b1cf8d6d1ed9daa

Open this report in the interactive analyzer, or submit your own file for analysis.