Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a656cd49c208953…

MALICIOUS

PDF

79.0 KB Created: 2021-03-22 20:23:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 75c7b1830f6007657a562191b07affb3 SHA-1: eb80dab74421e4dbcfa809e56dbbee6ad3c03fc0 SHA-256: 1a656cd49c20895392dfb9441f35d65a150103fd4cd99f219e50a70150c9326f
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. 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 a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/wix?keyword=world+basketball+challenge+unblocked+games+76 PDF link annotation
    • http://pokupka.space/fl_studio_tutorial_seriesuq7ya.pdfIn PDF document text
    • https://cdn.sqhk.co/jawefujivi/Akxhbjc/30706607608.pdfIn PDF document text
    • https://cdn.sqhk.co/losokifape/hcdvo7V/jumia_black_friday_deals.pdfIn PDF document text
    • https://cdn.sqhk.co/kakolutezegu/hghjhg0/gcaar_sales_contract.pdfIn PDF document text
    • https://cdn.sqhk.co/monazaxumol/gflwSSe/acc_qb_challenge.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/hjjgDBz/playmobil_ghostbusters_firehouse_manual.pdfIn PDF document text
    • https://batapasupo.weebly.com/uploads/1/3/1/4/131482803/xezovile.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/holt_mcdougal_algebra_1_online_textbook.pdfIn PDF document text
    • https://tirugisig.weebly.com/uploads/1/3/0/7/130738706/490a3d.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/jbc8B9K/magic_poser_pro_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vavapezami/hhdZkUo/95206610035.pdfIn PDF document text
    • http://larebalin.mypressonline.com/21568999746.pdfIn PDF document text
    • https://nakubinigana.weebly.com/uploads/1/3/1/3/131379761/edaaf73.pdfIn PDF document text
    • http://fasad-dom.site/fake_camera_kikk5hc5.pdfIn PDF document text
    • http://pihodze.com/jexuriribifatx2ch.pdfIn PDF document text
    • https://tipiridevozono.weebly.com/uploads/1/3/4/3/134349557/5147503.pdfIn PDF document text
    • https://cdn.sqhk.co/zeboxuze/fjghchf/layout_free_template_ppt.pdfIn PDF document text
    • https://cdn.sqhk.co/matajikiwov/fxhjhia/cyberpunk_2077_samurai_phone_wallpaper.pdfIn PDF document text
    • https://nipujari.weebly.com/uploads/1/3/1/3/131384055/tafogemewowur_wisopa.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/igjogi7/nixotaxap.pdfIn PDF document text
    • http://milanbeach.fun/6501191176s9wx9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jigemoli.epizy.com/agreement_on_safeguards.pdfIn PDF document text
    • http://sijadogif.atwebpages.com/academic_reading_articles.pdfIn PDF document text
    • http://xekujigifur.epizy.com/irregular_verb_with_past_form.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_off0000f6c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C6 5804 bytes
SHA-256: 5c009f234f5f69dbf6cb2ae5d849a28e292dccdb4cb77d377ee6968187a9a5a6
font_01_sfnt_off00010a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A71 10348 bytes
SHA-256: 00ee264a3e835e003b86b350e38d1c056fefa13c1b3084aad58079c72a43a03e

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