Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48d3ee943c95340…

MALICIOUS

PDF

77.5 KB Created: 2021-02-18 04:24:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 23992b61721828392c9e7bf01233f5c7 SHA-1: dea9d948a48af23328233556579248dfac24f00c SHA-256: d48d3ee943c953409c97fcc1623a4394346a7ecb3cbc9bf8d04cc145ef9cd8b9
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 0.9992

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://jacksth.ru/wix?keyword=capitulo+1a+repaso+answer+key PDF link annotation
    • http://itchia.space/the_handmaid27s_tale_season_1_episode_1_online_free5tkun.pdfIn PDF document text
    • https://sonatovixafu.weebly.com/uploads/1/3/1/8/131871956/2766475.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493195/normal_5fe374f00bdd7.pdfIn PDF document text
    • https://dudasajaje.weebly.com/uploads/1/3/4/3/134362454/94e39f06.pdfIn PDF document text
    • https://dupagerenukuxat.weebly.com/uploads/1/3/4/7/134751723/kudivenuk.pdfIn PDF document text
    • https://vugevosuza.weebly.com/uploads/1/3/5/3/135328642/8af5285e0548.pdfIn PDF document text
    • https://nasesugafod.weebly.com/uploads/1/3/5/3/135387958/pulixuxiv-tuwexezowume.pdfIn PDF document text
    • http://lnstgramhelpcopyright.com/mofenekukebe177d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464700/normal_5fde439e8db66.pdfIn PDF document text
    • https://zomimodobi.weebly.com/uploads/1/3/0/7/130739583/japovinuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447630/normal_601c9594b8dc6.pdfIn PDF document text
    • http://cybety.xyz/68489127034aaq6i.pdfIn PDF document text
    • http://fastpeysistem.online/rebejodipi4ck26.pdfIn PDF document text
    • https://silujufadusume.weebly.com/uploads/1/3/1/1/131164496/2472991.pdfIn PDF document text
    • https://posenumu.weebly.com/uploads/1/3/0/7/130776111/381b7df45e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421783/normal_601cb7d8aadcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379846/normal_600d155bb368c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mowigefugitixa.epizy.com/texas_gulf_coast_fishing_report.pdfIn PDF document text
    • http://bukuzagalu.rf.gd/gotimawajoxanusota.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/sql_server_report_builder_tutorial_video.pdfIn PDF document text
    • http://pimutanimodeme.rf.gd/uc_ship_waiver_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/game_cyber_hunter_lite_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/48007187529.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_off0000f356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF356 5028 bytes
SHA-256: f8d9d18448f900b0914d430605bb79feff8609cc322aef670dc22aa1a2b50dc6
font_01_sfnt_off0001049a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049A 10504 bytes
SHA-256: a4eb43c3d5d6cb2386a492191e3583dbc21c94a8ce96960a2776d01efcb8d09a

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