Malicious PDF — malware analysis report

Static analysis result for SHA-256 097a3e2427f54ad4…

MALICIOUS

PDF

74.7 KB Created: 2021-02-28 14:39:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aed09cbdb41cf5a620917d3447844ec2 SHA-1: 77089294bc1b9a9c2302ccd3fe17d9898ddf9218 SHA-256: 097a3e2427f54ad48d3c7ce323ac95ce5d3ead0bf97747a4c59e988d8f2052f0
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL appearing to be a lure for search engine traffic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=how+to+check+my+driving+record+in+maryland
    • http://dumubemajizukov.medianewsonline.com/how_to_do_works_cited_for_internet_sources.pdf
    • http://betijeduw.getenjoyment.net/dd_class_personality_test.pdf
    • https://dofazodasi.weebly.com/uploads/1/3/0/8/130873943/9913149.pdf
    • http://vubitim.sportsontheweb.net/como_hacer_un_bosquejo_de_predica.pdf
    • https://kitowido.weebly.com/uploads/1/3/5/3/135348724/556492.pdf
    • https://voxudipuxun.weebly.com/uploads/1/3/5/3/135319737/af79519f2.pdf
    • https://xiliperudal.weebly.com/uploads/1/3/3/9/133999468/tiwonikasiloxo-libewowevinis.pdf
    • http://sijubuwejipamun.mywebcommunity.org/nutrition_taco_bell_crispy_taco.pdf
    • https://biligimanud.weebly.com/uploads/1/3/1/4/131454089/b7668.pdf
    • http://fesadivu.iblogger.org/tolufakuretivibadev.pdf
    • http://jufidozotazi.66ghz.com/tegavexu.pdf
    • http://gokutep.22web.org/faguwakovar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xarojapi/how_to_lose_weight_eating_plant_based.pdf
    • http://nodibuxirojijok.epizy.com/values_education_curriculum_guide.pdf
    • https://s3.amazonaws.com/polexebuj/calculating_molarity_practice_worksheet.pdf
    • https://s3.amazonaws.com/defujo/free_6th_grade_math_measurement_worksheets.pdf
    • https://s3.amazonaws.com/wurivuve/50261214685.pdf
    • http://rosajeku.myartsonline.com/are_schwinn_spin_bikes_good.pdf
    • https://s3.amazonaws.com/tinivukedeta/giant_steps_lead_sheet_bb.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6d2.bin
7809b7d95a68186c71838de08517ddf371d257f9e5a593a2eb7f30d12ececf8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D2 5456 bytes
font_01_sfnt_off0000f950.bin
8f6c2a11a0531ff4c897f3c417cbf9103564e0bfd7f9fc89d493fc2d77018fb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF950 10576 bytes

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