Malicious PDF — malware analysis report

Static analysis result for SHA-256 15af0f45d8785b64…

MALICIOUS

PDF

75.4 KB Created: 2021-04-05 21:07:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6e10db17d43792d77d7d141ce8bce3d5 SHA-1: 646f455a15691e464ab4934703ac54be0d1a4e91 SHA-256: 15af0f45d8785b64759932869621e07ceb64e9c8d8edaf0d3861a3921dae7a18
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and heuristics indicate it is a link farm designed to redirect users to potentially malicious sites. The primary URL, 'https://ponafet.ru/strik?utm_term=what+is+the+correct+way+to+wear+iphone+earbuds', suggests a phishing or scam attempt by mimicking a search result. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure.

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://ponafet.ru/strik?utm_term=what+is+the+correct+way+to+wear+iphone+earbuds PDF link annotation
    • http://nilutafejo.mypressonline.com/38068059946.pdfIn PDF document text
    • http://snail-case.store/the_game_pickup_bookagblh.pdfIn PDF document text
    • http://uaregroup.com/what_is_the_thermal_equilibriumw9zkm.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/41669700618.pdfIn PDF document text
    • http://table-wait.com/vegigelrp4ok.pdfIn PDF document text
    • http://reabook.online/25752485269x28dx.pdfIn PDF document text
    • http://naturelofo.mypressonline.com/xadosiviwunome.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/gudujebexabebel.pdfIn PDF document text
    • http://istlan.space/luzazuwepugovn03d9.pdfIn PDF document text
    • http://vozobatenaw.mywebcommunity.org/8874342630.pdfIn PDF document text
    • http://50offshop.pro/98999790734zjd1g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_f629cc3d1e1c4298bf6ef55a9eeed4cc.pdf?index=trueIn PDF document text
    • https://a21f0d7d-5fe0-4a99-a381-3b18266e0880.filesusr.com/ugd/6c313a_262d598bc0de4d6aa03ee66096a7e1ad.pdf?index=trueIn PDF document text
    • https://6e678f60-abc6-404c-883a-cd1729fdffee.filesusr.com/ugd/e4291f_c01c55650da541f7af35b966dde6d6e9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/how_to_make_a_line_graph_in_math.pdfIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_2893fc7f2ea2430da109787cca26e104.pdf?index=trueIn PDF document text
    • http://wuxosalilujaza.atwebpages.com/school_calendar_2020_20.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/zamatubegolusobe.pdfIn PDF document text
    • http://kepagewav.atwebpages.com/darkest_days_lyrics_black_label_society.pdfIn PDF document text
    • http://merovuditipin.onlinewebshop.net/lettering_and_numbering_in_engineering_drawing.pdfIn PDF document text
    • http://kipejefanowisu.atwebpages.com/1st_grade_math_worksheets_free_download.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_off0000e667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE667 5476 bytes
SHA-256: 3a053ea047a73c0676c162c35b51f6247e6411d7bef3878dd30206eb4c63e541
font_01_sfnt_off0000f915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF915 10904 bytes
SHA-256: 7d3ff976b4d210b06cefbc1b442c753fe5748c692efae02bd26ba753066dd78f

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