Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea77f3a803e96f8c…

MALICIOUS

PDF

77.2 KB Created: 2021-03-27 18:01:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7aafa339f85e3e9809c83cd8af99e340 SHA-1: eb9c5d26560fd50da95ece6a705c367b66f3cbd4 SHA-256: ea77f3a803e96f8c0903ea58e21fa467ea1240c635e057da31c8664557b11283
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-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://xajibur.ru/strik?utm_term=home+depot+soft+white+led+christmas+lights PDF link annotation
    • http://likedizar.medianewsonline.com/oracle_sql_substr_after_last_character.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387243/normal_601556d68c310.pdfIn PDF document text
    • https://cdn.sqhk.co/kelanadu/jg6Z1lr/gafojarazilosozawipisotew.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/hahbFjg/tifovovo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372982/normal_604ad9a09da0c.pdfIn PDF document text
    • http://situvupumu.medianewsonline.com/dictionnaire_thmatique_maritime_anglais_franais.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/sennheiser_rs_175_headphones_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/VBhagi9/singing_bowl_set_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/temisexezoda/Dhdjjef/snowflake_ipo_stock.pdfIn PDF document text
    • https://cdn.sqhk.co/jisokemefaz/fnCUjiJ/74601460883.pdfIn PDF document text
    • http://xazapefunel.getenjoyment.net/oxidative_stress_biomarkers.pdfIn PDF document text
    • https://cdn.sqhk.co/zulatobi/dQ4jbEp/fipetuletipufovasojisada.pdfIn PDF document text
    • https://cdn.sqhk.co/kusamika/hkjfhd4/53560373706.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375702/normal_5fe5fb6aa6b04.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/efgiqAG/dixokesu.pdfIn PDF document text
    • https://cdn.sqhk.co/muligumixe/aJifib5/mawujalopupisuzefu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407807/normal_604ee0c65a48c.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/jbjdgjQ/lelogoxesekujosogafinu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482638/normal_5ffe538bcbacb.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/mgfjfjc/xerotikugajizitebaxaxifap.pdfIn PDF document text
    • http://xipodijajul.sportsontheweb.net/la_arqueologia_del_saber_descargar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000edb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB1 5624 bytes
SHA-256: 96f56f2d370df2a4eb6b3812db5d520a3300d99f42eaeeb4a58f0221b9edefd3
font_01_sfnt_off000100b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B9 11588 bytes
SHA-256: 3c107eb201fe5196592ec797def3189e7e1c3d86b9b1fed53636164daac0631a

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