Malicious PDF — malware analysis report

Static analysis result for SHA-256 59a26ecb6463d04b…

MALICIOUS

PDF

84.3 KB Created: 2021-03-15 23:49:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e9bc77b9df1f8cc9cbd5ba616cd46e9f SHA-1: a90bf439e9f9ac675164bd9d3ec4004d291d2828 SHA-256: 59a26ecb6463d04bfc504e09c6e34221fb77c7c80bb874fd0b8e5d1fc8c8b79b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are indicative of a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to 'landscaping' and 'wkhtmltopdf', suggesting a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/strik?utm_term=how+to+do+home+landscaping PDF link annotation
    • http://lelekelosutov.getenjoyment.net/savusudatofafa.pdfIn PDF document text
    • http://kakorezikudu.mypressonline.com/possessive_nouns_worksheets.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476925/normal_5ffec4ea50fe1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503050/normal_5fd1002162d2f.pdfIn PDF document text
    • http://mukinumatonewo.getenjoyment.net/numegaxegokuwiverup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391008/normal_5fcf95cd30d82.pdfIn PDF document text
    • https://cdn.sqhk.co/nefakovuwot/hZiYe3k/jobekizeb.pdfIn PDF document text
    • https://cdn.sqhk.co/xokipuxat/wjfoifr/running_fred_2_y8.pdfIn PDF document text
    • https://cdn.sqhk.co/bosesegivu/mChaJfB/chocolate_cake_recipe_for_6_cupcakes.pdfIn PDF document text
    • https://cdn.sqhk.co/fomeluxilim/idghbPh/fitbit_versa_3_vs_sense_comparison.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/wjhUjeg/73613106090.pdfIn PDF document text
    • http://rarokafu.22web.org/android_9_update_for_samsung_m20.pdfIn PDF document text
    • http://rilomenininun.getenjoyment.net/16229048550.pdfIn PDF document text
    • http://dotixomovi.sportsontheweb.net/4575635883.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453906/normal_604c99d6a52e4.pdfIn PDF document text
    • http://vifepixakusuped.iblogger.org/hand_over_letter_template.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://roveramo.atwebpages.com/juwaxewuw.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/expresiones_comunes_en_ingls.pdfIn PDF document text
    • http://bilofudako.onlinewebshop.net/lab_report_template.pdfIn PDF document text
    • http://xilijimerufosat.rf.gd/norogizibimunuba.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/5101458493.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/90636763572.pdfIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/95126681267.pdfIn PDF document text
    • http://dakekamuma.rf.gd/35006475556.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/xawomaredoledelekerozu.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_off00010c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0E 5444 bytes
SHA-256: b0bdceacb57b4032f5e5ee1d643075bcd23627bf70833ca65470d3f986c67797
font_01_sfnt_off00011e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E80 10832 bytes
SHA-256: 3a08d79f67ac3915875df58a568cdab06c99ee6d230eeef147eb0d2b10a46ec8

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