Malicious PDF — malware analysis report

Static analysis result for SHA-256 5342f95a3c44f157…

MALICIOUS

PDF

82.8 KB Created: 2021-04-02 16:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd342b081eba1894abd39addb2cfda07 SHA-1: 6b947a67e2aa1b20204a704962cb7feb52ba9523 SHA-256: 5342f95a3c44f157153856d21f557abc6f5c3b95d9114abd74906b00b5100596
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm or SEO manipulation scheme. ClamAV and ML classifiers indicate this PDF is malicious, likely a phishing or trojan delivery mechanism. Although no scripts were explicitly extracted, the PDF structure and the presence of many external links suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/strik?utm_term=craig+jukebox+bluetooth+speaker+system+with+color+lights
    • http://linavaluviriv.getenjoyment.net/wakisalamuzubupawateduw.pdf
    • http://lenuvivureropi.scienceontheweb.net/salunumaxemamudasosixedok.pdf
    • http://allieshouseofhope.com/97726524402mrcdz.pdf
    • http://molotkov.site/76421152408yrsjl.pdf
    • http://vazawujuzu.sportsontheweb.net/xesatafivuwigixotisoz.pdf
    • http://joriwolujuf.sportsontheweb.net/94263221995.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_178fa015cf324737b32b88bd9b679b63.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d82e1c9f-0602-4432-a0aa-72323fb222ff/flowers_for_algernon_book.pdf
    • https://s3.amazonaws.com/jolunenafobuw/kinesio_taping_for_tennis_elbow.pdf
    • https://uploads.strikinglycdn.com/files/e50a22a7-7319-4d9f-8b26-3d9368e55744/lista_de_verbos_regulares_en_ingles_en_presente_simple.pdf
    • https://uploads.strikinglycdn.com/files/8fb24954-8159-4302-bafb-a089955c73b8/thomas_calculus_early_transcendentals.pdf
    • https://uploads.strikinglycdn.com/files/c9d81b5e-7e0e-4856-abb4-5dcd3fe05d47/zexawinakimut.pdf
    • https://s3.amazonaws.com/wolawatin/report_fake_goods_uk.pdf
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_5645ababf5254b1dbb4473b354f97078.pdf?index=true
    • https://s3.amazonaws.com/wuzalugiseto/how_long_should_i_jump_rope_to_see_results.pdf
    • https://e9593579-f51f-4dc6-af55-2543ab512b45.filesusr.com/ugd/37952c_7fc1cf11e781423789c84a0f9323c69f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/829cb5a2-bbf7-4d6e-9709-f2a79156a2f9/self_leadership_and_the_one_minute_manager_free.pdf
    • https://uploads.strikinglycdn.com/files/498ab3b3-ada6-4417-b553-5579de2a3f49/bayesian_data_analysis_reddit.pdf
    • https://s3.amazonaws.com/napoledunadigo/application_format_for_phd_admission.pdf
    • https://uploads.strikinglycdn.com/files/1e9916d9-4975-4383-9a33-8d9ff985cc5e/11925890996.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_off0001046a.bin
7a3c08bbc49872d2cb2733d799e9c16a72f9a53e5df1ec8c9a36b97b76858bc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1046A 5796 bytes
font_01_sfnt_off0001180d.bin
19787bd786163450dc68ee3d4c7973df8033402c2f2694b741c902f6320c9295		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1180D 11036 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.