Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc66ccec59a3976a…

MALICIOUS

PDF

74.3 KB Created: 2021-03-09 13:33:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8788ab309e8b48db70f9e86a70a6811e SHA-1: 59883e017d978cb51e38e8e9553a4e0b3bf02e2a SHA-256: fc66ccec59a3976a26f7bab8aaa029ed3d7724951622c021038434bd282551b5
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, likely for credential harvesting or malware distribution.

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://fokemale.ru/strik?utm_term=mrs.+mcnosh+hangs+up+her+wash+reading+level PDF link annotation
    • http://help-violation.com/deruxagaloxm2yu.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/e4b62pk/16755641664.pdfIn PDF document text
    • http://latencfsrt.space/what_is_the_prophecy_in_percy_jackson_sea_of_monstersvo1gh.pdfIn PDF document text
    • http://quickstore.pro/21926068721hlvux.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/jgoqJic/run_ninja_run_3_game_download.pdfIn PDF document text
    • http://kudretbozaci.com/ccleaner_pro_apk_terbaru_2018jtr1t.pdfIn PDF document text
    • https://cdn.sqhk.co/juvosuneni/iePvgjv/xibaga.pdfIn PDF document text
    • http://pinerapidsrr.com/84579918155f5mkd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375909/normal_60399ef044b71.pdfIn PDF document text
    • http://dkmz3.club/nova_icse_physics_lab_manual_class_9_solutionsqz291.pdfIn PDF document text
    • http://instapriz.online/98539339666ak2j3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403259/normal_5ffe7f5f6dc67.pdfIn PDF document text
    • http://lnstagramsupportingcenter.com/booklet_templates_indesignk7778.pdfIn PDF document text
    • http://huseyincanx.com/does_wix_let_you_use_your_own_domain67qvh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_23ddf6854af54440a76f0835365703e8.pdf?index=trueIn PDF document text
    • https://acd80754-3b70-42c6-a60f-3489f6261da4.filesusr.com/ugd/f1780b_ecb0a91dc54f4bbd9d50d33c4236ec23.pdf?index=trueIn PDF document text
    • https://3175e58c-9db9-4d87-bcb9-15e03531d93d.filesusr.com/ugd/c93210_37d981a281e746a79eefba4a0bc9d235.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tazopaju/xero_invoice_templates_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/56316907154.pdfIn PDF document text
    • https://d2ea4bfc-f92a-4379-acf2-d9b69981ddb7.filesusr.com/ugd/739437_d428b2259c614843bb6b6c2a8466b910.pdf?index=trueIn PDF document text
    • https://6ba8113a-99dc-4618-97bf-d7180f10ff72.filesusr.com/ugd/b6edda_210d05db38f440d39e7619fc0ac08319.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/adanga_maru_ringtone_zedge.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/42080980231.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/myers_briggs_compatibility_intp.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_off0000e35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35B 5676 bytes
SHA-256: 956d3d317331bfc147e1c3104d1e5ff178f840fa891f45c510347a00da1d0458
font_01_sfnt_off0000f6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A6 10192 bytes
SHA-256: ce77259f9c34e40166aa99c887661890c64880a60e91594e5ae17bdca970b68d

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