Malicious PDF — malware analysis report

Static analysis result for SHA-256 0602f83679b8f7f4…

MALICIOUS

PDF

74.8 KB Created: 2021-02-25 05:27:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: cc4cc3b0a0a5d796a01d1592dab2e324 SHA-1: 19267913803c49f856755a6664db67e487bac938 SHA-256: 0602f83679b8f7f4bbd2547107f1c85ebd29eadd22afca29e6d8cc370412173e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity, likely involving the exploitation of PDF viewers or redirection to malicious sites.

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://bologen.ru/123?utm_term=harry+potter+books+vs+movies+which+is+better PDF link annotation
    • http://site-shop.xyz/99092537287pdvt4.pdfIn PDF document text
    • http://vizabofunedaj.22web.org/actionable_information_en_francais.pdfIn PDF document text
    • http://topitoxituzoju.iblogger.org/60815416640.pdfIn PDF document text
    • https://xalitizamer.weebly.com/uploads/1/3/4/8/134863297/4805397.pdfIn PDF document text
    • http://gavewedek.iblogger.org/wanted_bengali_movie_hd_video.pdfIn PDF document text
    • https://zetojaxonafavop.weebly.com/uploads/1/3/5/3/135309172/2e1be.pdfIn PDF document text
    • https://bedaxeribijone.weebly.com/uploads/1/3/2/8/132814155/pufujobelo.pdfIn PDF document text
    • http://itgermany.net/how_to_fix_sump_pump_airlock1sz2t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tafiwepamubov.atwebpages.com/the_trials_of_apollo_book_2_reading_level.pdfIn PDF document text
    • http://lususexore.epizy.com/fabilivegunof.pdfIn PDF document text
    • http://zudupaxub.myartsonline.com/47135855574.pdfIn PDF document text
    • http://zitasixan.atwebpages.com/what_is_the_cost_of_starbucks_coffee_in_india.pdfIn PDF document text
    • http://tesalivolanimeg.rf.gd/ionic_3_ecommerce_template_free_github.pdfIn PDF document text
    • http://mixaluzosibad.rf.gd/browser_mozilla_firefox_free.pdfIn PDF document text
    • http://girofili.myartsonline.com/how_do_i_turn_off_subtitles_on_my_samsung_tv.pdfIn PDF document text
    • http://borinalujid.epizy.com/bdo_full_form_in_finance.pdfIn PDF document text
    • http://vapasiwivomod.epizy.com/todugifoxipuxabagepaz.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_off0000e7b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B1 5560 bytes
SHA-256: 8124b000267bb8bc24d3eed2c2dc002cbfa671f5f62843b8ae4186cce5840aba
font_01_sfnt_off0000fa85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA85 10400 bytes
SHA-256: c1029cbb8e126a5c69aa91338d8adbf83c4f806dd6df1e0cee52d41313c9a586

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