Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae55fbca40ce09c…

MALICIOUS

PDF

91.1 KB Created: 2021-02-28 06:43:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cec420fb5c800f8b639c18cdf9a578f5 SHA-1: 652646a3d24d1d76d26c1044ee65575e248d712c SHA-256: eae55fbca40ce09c980d8966d8d80bb4a789f85f36695652f2de955ec6153580
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, indicating it functions as a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of many external URIs suggest a phishing or malicious redirection attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

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://jumiwimov.ru/wix?keyword=dividing+complex+numbers+worksheet+doc PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4468838/normal_5ffe2d9492cb3.pdfIn PDF document text
    • http://lovelatu.iblogger.org/definicion_de_salud_publica_segun_varios_autores.pdfIn PDF document text
    • https://cdn.sqhk.co/gujadozede/e2gfc2a/nuzudubivolavetapujusa.pdfIn PDF document text
    • https://cdn.sqhk.co/bexefoboxevi/6gijgit/us_stock_exchange_bank_holidays_2020.pdfIn PDF document text
    • https://xijiruxexewige.weebly.com/uploads/1/3/4/7/134725886/2a08b583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386337/normal_601795ddbf117.pdfIn PDF document text
    • https://zeruposizagaki.weebly.com/uploads/1/3/4/8/134854722/8267322.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451228/normal_5fd8cf88e1c3f.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/jdtjfwk/app_orange_money_senegal.pdfIn PDF document text
    • https://fozogefijegajor.weebly.com/uploads/1/3/1/4/131453134/xewovuwelil.pdfIn PDF document text
    • https://tekitoloveda.weebly.com/uploads/1/3/1/0/131070611/lisebi_xaxibuvelisab_pidibunawopixej.pdfIn PDF document text
    • https://cdn.sqhk.co/toxodimina/aSWYejd/nikon_camera_control_pro_2_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bonoburadik.epizy.com/96870165109.pdfIn PDF document text
    • http://petizitopebil.epizy.com/avengers_endgame_full_movie_link_quora.pdfIn PDF document text
    • http://rapanitafozofuz.epizy.com/what_is_diffusion_of_innovation.pdfIn PDF document text
    • http://sanagubilisefuw.rf.gd/71028593856.pdfIn PDF document text
    • http://nulitapa.rf.gd/proform_treadmill_belt_alignment.pdfIn PDF document text
    • http://kavonuloruzofeb.rf.gd/20201146856.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/how_to_calculate_cagr_in_google_sheets.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE5 5700 bytes
SHA-256: 9da0c2e5296cecafaa19a276c8dc4171be6310321a84685339b8452b4a989a3f
font_01_sfnt_off0001233c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1233C 11212 bytes
SHA-256: c969d9380b09753446a348e7d69ec4cb518ee1880c023ebe8054793fd2d600a2
font_02_sfnt_off000149b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149B5 16072 bytes
SHA-256: 062f8a7185608a18dbd56baf48eb14c791e3c6ea8866a2ddd6a03467109098f1

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