Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0885cebbba25709…

MALICIOUS

PDF

65.8 KB Created: 2021-04-02 19:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0766fa2177954e8c3fc27aef6408c4f8 SHA-1: 8ab96f121cf5dbf5a6a4d5c345d21206282896c7 SHA-256: e0885cebbba2570905ccd861f31030342342a8987f4c2b6cc60998b340a3d280
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URLs, with one specifically identified as a link farm on disposable hosting, suggesting an attempt to redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution scheme.

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://soxebez.ru/aws?utm_term=woods+outdoor+timer+instructions+50011 PDF link annotation
    • https://jutulomivepira.weebly.com/uploads/1/3/4/7/134775876/7146091.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/fABHfST/jimuwipirikon.pdfIn PDF document text
    • http://jeseselanus.scienceontheweb.net/1914_luciano_canfora.pdfIn PDF document text
    • http://wivikaxebox.medianewsonline.com/book_to_read.pdfIn PDF document text
    • http://xagugudel.sportsontheweb.net/welapuliwogugujejediga.pdfIn PDF document text
    • https://fuvejewitopi.weebly.com/uploads/1/3/1/0/131070508/394819.pdfIn PDF document text
    • https://cdn.sqhk.co/kiribikiv/JggjbXQ/cross_cartoon_in_urdu_barbie.pdfIn PDF document text
    • https://rekasefuwe.weebly.com/uploads/1/3/0/9/130969231/7fd0a.pdfIn PDF document text
    • http://diwokaxojizo.iblogger.org/1001_arabian_nights_in_hindi.pdfIn PDF document text
    • http://bulubuzigajuzar.getenjoyment.net/59367309564.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409238/normal_605d84d56d359.pdfIn PDF document text
    • http://womizepivilora.sportsontheweb.net/bhagavath_geethai_tamil_free_download.pdfIn PDF document text
    • http://zuxemesemubozo.mywebcommunity.org/abzurdah_libro_completo.pdfIn PDF document text
    • https://cdn.sqhk.co/jijubexovoz/Eifiahf/starfish_movie_2018_wikipedia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xelidamos.epizy.com/dads_worksheets_sudoku.pdfIn PDF document text
    • http://setiwifuv.rf.gd/san_francisco_bay_area_map.pdfIn PDF document text
    • http://nukivamo.myartsonline.com/what_are_the_dates_for_the_sat_in_2020.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/creative_thinking_test.pdfIn PDF document text
    • http://jalebuvubo.myartsonline.com/64432975374.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_off0000c45d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC45D 5176 bytes
SHA-256: ff65582220edae6a0708dc3487d32b9b31ab62e1aee7881ccbb4eed7ee86534d
font_01_sfnt_off0000d5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FD 10168 bytes
SHA-256: d438587cf674124b3456ec73f6b3f16b544c884626a7c32685809750f431aeec

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