Malicious PDF — malware analysis report

Static analysis result for SHA-256 66d303bd7aa919d6…

MALICIOUS

PDF

72.0 KB Created: 2021-02-14 13:03:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: efbe5c6b3d4aac2c325651c673da06a5 SHA-1: 38e299c222e144bea6a371cbbf63404ae31c3e09 SHA-256: 66d303bd7aa919d69d5c2aea82d3841e564217d0830269ebd57fa58d10d47774
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://crophysi.ru/wix?keyword=persona+trophy+guide PDF link annotation
    • http://luchdobro.site/carbon_black_defense_log_formatb88sg.pdfIn PDF document text
    • https://vivazezege.weebly.com/uploads/1/3/4/0/134041722/517072.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409102/normal_5fda64b98d6d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485004/normal_5ffdf0d49b9e7.pdfIn PDF document text
    • http://xavimelobuvi.22web.org/avatharam_malayalam_movie_audio_songs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461485/normal_601e99383f3f6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lorenivi.rf.gd/baskerville_semibold_italic_font_free.pdfIn PDF document text
    • http://sapirilogive.epizy.com/senowiji.pdfIn PDF document text
    • http://pufupivati.epizy.com/36558178401.pdfIn PDF document text
    • http://rekutuvogunavur.rf.gd/chipotle_chicken_burrito_bowl_nutrition_information.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_off0000df44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF44 5292 bytes
SHA-256: f3d7c91588ffb38e6e8a4eacfc1d23c25764619bfee15842cb8b6b0299f1dd6a
font_01_sfnt_off0000f147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF147 10016 bytes
SHA-256: 58877da7184a144929939f0efc708986f32922dc16bf78c3a610de2b8ca49921

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