Malicious PDF — malware analysis report

Static analysis result for SHA-256 789f80bc059c541e…

MALICIOUS

PDF

81.6 KB Created: 2021-03-04 06:47:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd2bf7cda88a4ff84136dd08e0bd0cf7 SHA-1: 96173a01edd40ec662547ddc058887f03ab025fc SHA-256: 789f80bc059c541e02238177ab57f8a5e86bfd20d5bb1bd5375d99778e0491bf
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/123?utm_term=sodastream+fizzi+repair
    • http://sugameloxufe.mywebcommunity.org/jiwexijavinoponawelo.pdf
    • http://fesotisifofil.mygamesonline.org/how_to_get_certified_forklift_operator.pdf
    • http://findfreegirl.com/83729896892bmzrc.pdf
    • https://liduwofixuxobef.weebly.com/uploads/1/3/0/7/130739348/puxus.pdf
    • http://salestore.pro/980056234803jx0u.pdf
    • http://netewe9.xyz/wakudosufeforusasufih7c3d.pdf
    • http://rubeatyshop.xyz/disgaea_2_beginners_guide7elcn.pdf
    • http://table-wait.com/office_365_user_manualzc8uv.pdf
    • https://dedopaka.weebly.com/uploads/1/3/4/4/134498192/5252107.pdf
    • http://hightrade.club/kobelejabudoruzevamou3kmq.pdf
    • http://medyahanem.com/zemugekibulp7ls.pdf
    • http://wide-take.top/spss_amos_crack_free4v0e9.pdf
    • http://zixudivibudizu.scienceontheweb.net/ejemplos_de_dialogos_cortos_entre_2_personas.pdf
    • http://shop-profildoors.ru/php_programmingkec8p.pdf
    • https://donasidavojixa.weebly.com/uploads/1/3/4/4/134494786/vewedusagafu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pebomotixot.myartsonline.com/how_to_write_my_professional_accomplishments.pdf
    • http://wokarodefi.onlinewebshop.net/what_are_the_6_genres_of_writing.pdf
    • http://nokejufesuw.atwebpages.com/modosuzigamati.pdf
    • http://vekemelegewimo.atwebpages.com/how_do_you_find_exterior_angles_of_a_polygon.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_off000105e1.bin
90e2b13011488a00ab38c655ffd64d00f187431b7e457b94c384c2738924aa90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105E1 5308 bytes
font_01_sfnt_off000117e1.bin
873f4d8752d5f2e0e5df80338213357c469fc345eee7f3c524e50dfaf2f4569a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117E1 9676 bytes

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