Malicious PDF — malware analysis report

Static analysis result for SHA-256 13163fbb0e1ac11e…

MALICIOUS

PDF

74.3 KB Created: 2021-04-28 15:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 65c1e9751adcaf1e059b8a1c46130c95 SHA-1: 9d87f0a62d6843f49b374897428002affb993900 SHA-256: 13163fbb0e1ac11e611fcb103d4635ec37e2da2f89cf0b1c6a21a0e0bc9cf31b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded URLs and heuristics indicate it is a link farm designed to redirect users. 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 'Xfinity voice remote setup button', which is likely a lure to encourage clicks on the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/strik?utm_term=xfinity+voice+remote+setup+button PDF link annotation
    • https://junezemojevav.weebly.com/uploads/1/3/2/7/132740237/6488614.pdfIn PDF document text
    • https://cdn.sqhk.co/fetedudi/nywEQNl/coolie_no_1_movie.pdfIn PDF document text
    • https://pidowiwosuzaji.weebly.com/uploads/1/3/0/9/130969191/jeluzigovil-mekamusa-pajogigumeli.pdfIn PDF document text
    • http://gugibugud.mygamesonline.org/asientos_contables_con_iva_ejercicios_resueltos.pdfIn PDF document text
    • https://cdn.sqhk.co/nuduniguwufo/iigdJEy/boku_no_hero_academia_amino_espanol.pdfIn PDF document text
    • http://vonurejawata.iblogger.org/zijiloralofotamovari.pdfIn PDF document text
    • https://bejixetixozivi.weebly.com/uploads/1/3/4/4/134499198/6092071.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/jovekus/92344794140.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/88990090078.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fd1cbd5-3222-475c-8286-2bc8b6c5f5b2/what_is_the_final_step_in_developing_a_safety_inspection_checklist.pdfIn PDF document text
    • http://daxokefi.epizy.com/27583709356.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/wesamadoj.pdfIn PDF document text
    • http://tuzuxutetug.atwebpages.com/xatapojudofitif.pdfIn PDF document text
    • http://lozepis.epizy.com/wings_of_fire_book_1_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/rusumofizoborojedodubax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0167750-7c84-4dfa-ae8a-cd01bf7c1a62/how_much_does_it_cost_to_replace_a_laptop_motherboard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffb342e5-6025-4584-abb0-488eefd14818/kasadafile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfbb71cd-6460-4c5f-a249-672f40344b4b/how_to_learn_english_grammar_step_by_step_in_hindi.pdfIn PDF document text
    • http://badiwiv.epizy.com/suzifekatumisagililakono.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_off0000e616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE616 5196 bytes
SHA-256: 06ab836e1b016ec578b3ccb831e486dc9ce5f597ccc0c2fd4be8f1978eed8fef
font_01_sfnt_off0000f7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BC 10680 bytes
SHA-256: 62deca76daa3246291277180cdd55b480b7375476d12a178253e545620253b8a

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