Malicious PDF — malware analysis report

Static analysis result for SHA-256 75c5ce408a21d704…

MALICIOUS

PDF

70.9 KB Created: 2021-03-02 12:44:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 152108d4b4bb04fe89e5d9fd098633a6 SHA-1: 9242d927793dcfa054839cba3e87bd889e1bda1e SHA-256: 75c5ce408a21d70490632be264fd7429f5d3fab60eaa79a3423c6fec84863616
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 0.9997

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://leonvi.ru/strik?utm_term=does+roomba+need+wifi+to+work PDF link annotation
    • http://taxavifosobedul.iblogger.org/vorodavixeg.pdfIn PDF document text
    • http://xiwesesakuvel.medianewsonline.com/how_to_put_salt_in_my_water_softener.pdfIn PDF document text
    • http://toxipoxekej.medianewsonline.com/pamaperetexonixejak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366654/normal_6007e8312e3ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374360/normal_5fdf6a5a9f630.pdfIn PDF document text
    • http://fakexexu.sportsontheweb.net/microsoft_flight_sim_xbox_1_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/zupuguvawaj/ehciagc/toy_story_smash_it_apk_full_espanol.pdfIn PDF document text
    • http://vevaxogejaz.scienceontheweb.net/all_the_bright_places_netflix_summary.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lujolugajejizog.epizy.com/euphonium_trio_free_sheet_music.pdfIn PDF document text
    • http://nakeviw.myartsonline.com/tfs_2015_requirements.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/how_to_study_for_step_1_in_2_months.pdfIn PDF document text
    • http://livirava.atwebpages.com/sutojowevepibubolino.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_off0000d8ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AC 5316 bytes
SHA-256: 91ec91688a1cb2dd55b086fc681fefb9efc0a0183e9ca7fd06e008759ff6bba6
font_01_sfnt_off0000eabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABC 10884 bytes
SHA-256: 311d771fed6caee1186d960147ce82f7e424625e321721a7a1470959c4b14b40

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