Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad0377d51f57e40…

MALICIOUS

PDF

74.7 KB Created: 2021-03-26 09:48:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c15ab59ae1a2713d3e6262dee53f1d07 SHA-1: 307796ed11d3278d557d8e4cdb6e35c9b0601cda SHA-256: 2ad0377d51f57e407a810057bda1ca92601863874bb42d9989a786233be700a0
126 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including a machine learning classifier and ClamAV, as malicious. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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=agathiyar+tamil+movie+hd+free PDF link annotation
    • http://ferafukapawap.scienceontheweb.net/the_role_of_religion_in_modern_society_essay.pdfIn PDF document text
    • https://ratipiju.weebly.com/uploads/1/3/0/7/130740089/jalofikilina.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413007/normal_60091ca24d5b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467915/normal_605d67c1af695.pdfIn PDF document text
    • http://sellforce.ru/50788553761i3z9y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470839/normal_60431686dc07a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489414/normal_5fdea18896465.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485704/normal_6023aee969a93.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/lojoruvopokafawup.pdfIn PDF document text
    • http://warupipujamoru.sportsontheweb.net/los_tipos_de_funciones_del_lenguaje.pdfIn PDF document text
    • https://ludalobupum.weebly.com/uploads/1/3/4/5/134528654/2a3845e4.pdfIn PDF document text
    • http://presente-top.store/inheritance_book_4czinj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464301/normal_5fd0e3b9bc8c7.pdfIn PDF document text
    • http://natorg.fun/sobotipokevumnuvsj.pdfIn PDF document text
    • http://evatopshop.xyz/what_does_the_term_categorical_imperative_meansimjg.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/modern_spanish_grammar_workbook.pdfIn PDF document text
    • https://badosajag.weebly.com/uploads/1/3/1/4/131407507/07697fdf769.pdfIn PDF document text
    • https://dudunetexuzo.weebly.com/uploads/1/3/1/3/131379759/8551367.pdfIn PDF document text
    • http://portkamesto.site/bradbury_group_rollforming143gn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488137/normal_5ff05b511a955.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/wexigumarusasawijijotelam.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/10955694886.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/cloud_9_disney_movie_cast.pdfIn PDF document text
    • http://vewawisu.onlinewebshop.net/which_meteor_is_heading_for_earth_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/82727331711.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD648 5296 bytes
SHA-256: e939463893b51aab29acf3f2b95dcb8200cfaa9d158363e02f3d4f14bc4c1781
font_01_sfnt_off0000e835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE835 6736 bytes
SHA-256: a186864ec45c7b6c4784ea681f7dd2682e9a54c6fd315d44dd63e696bc31fdf1
font_02_sfnt_off0000fcce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCE 9360 bytes
SHA-256: b2e059f8533848a4ef53d0ebb33bebd68e23db12e9f9e2d5806ff7e443df13b0