Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b733d0efa4483e7…

MALICIOUS

PDF

91.1 KB Created: 2021-04-01 15:37:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b11fe3d9266cfe0b28f9eadd6a3cbaad SHA-1: 1da899030323436f48fdacb11235d4b26216a00b SHA-256: 1b733d0efa4483e7f5018ce75000a681b85c736ee6f812ea3a8374014c4af04a
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 0.9967

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://golowaki.ru/strik?utm_term=how+to+thread+a+sewing+machine+pdf PDF link annotation
    • http://silkhfig.bid/michael_pollan_in_defense_of_food_quotes9yl84.pdfIn PDF document text
    • http://senteber.site/bexumolodaraluwaxexituhneur.pdfIn PDF document text
    • http://grinallex.shop/rexetuvzvz5e.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/i5jfyQK/live_stream_nfl_monday_night_football.pdfIn PDF document text
    • http://italywow.pro/sinergismo_y_antagonismo3px1o.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/descargar_el_himno_nacional_de_honduras_completo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410433/normal_6042ed990e5b2.pdfIn PDF document text
    • https://cdn.sqhk.co/towinomer/9hbYxgD/9850687846.pdfIn PDF document text
    • http://wedevaz.sportsontheweb.net/fapawadapamodu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470019/normal_603ac13f2a4c4.pdfIn PDF document text
    • http://bandalet.club/mufosiwuwagozekofefewox3xkok.pdfIn PDF document text
    • https://cdn.sqhk.co/tumufiwusifo/8gjicou/rupimumebetoxodesujireri.pdfIn PDF document text
    • https://cdn.sqhk.co/zidulibu/3ihN1T0/alivio_medical_center.pdfIn PDF document text
    • https://cdn.sqhk.co/pumafuki/hcgfFE7/mind_games_movie_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489251/normal_60279a297325e.pdfIn PDF document text
    • http://butalinonoruma.scienceontheweb.net/patient_bill_of_rights.pdfIn PDF document text
    • http://mavixepajifulem.scienceontheweb.net/16975695508.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465249/normal_60069c112ff18.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/najipavez/honda_inverter_generator_eu2200i_for_sale.pdfIn PDF document text
    • http://rujidafedisezu.atwebpages.com/slot_antenna_theory.pdfIn PDF document text
    • http://ripufos.epizy.com/subject_matter_expert_job_description.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/polk_audio_psw10_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/shiva_rudram_sanskrit.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/dr._arnold_ehret.pdfIn PDF document text
    • http://rilexukalenenig.rf.gd/bamorer.pdfIn PDF document text
    • http://nogekaz.epizy.com/29970655878.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_off000125da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DA 5588 bytes
SHA-256: 8c2a87ad65eef45d2524664b9e4d0fb953f29420022b4460d27294eaf77d2ed4
font_01_sfnt_off000138c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138C7 11132 bytes
SHA-256: 511af585458651e85025c6aedcee0a289ab7a22d49c10b8017e38775a620e4e2

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