Malicious PDF — malware analysis report

Static analysis result for SHA-256 1523b032cfb9fe0c…

MALICIOUS

PDF

74.1 KB Created: 2021-03-02 23:58:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2d9246be45fc387c1b68804e8a8c00e2 SHA-1: ad828852ce26172436bef50a8119918ca3327bfe SHA-256: 1523b032cfb9fe0cc61c05e09b65d3a18fefd56b0ffac71d96ba572784f8377f
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

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://druttle.ru/wix?keyword=raisin+in+the+sun+essay+title PDF link annotation
    • http://fujigukatujewu.medianewsonline.com/4986950341.pdfIn PDF document text
    • http://nncucuucuc.space/ap_style_state_abbreviations_in_textvmilg.pdfIn PDF document text
    • http://marketitaly.pro/what_is_the_dog_called_in_neverending_storynf7pg.pdfIn PDF document text
    • http://www-sfr-fr-monespace.com/cyclohexanol_chair_conformation646kg.pdfIn PDF document text
    • http://xejepurefe.scienceontheweb.net/rimekulaxiwi.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/ars_poeticape04a.pdfIn PDF document text
    • http://vertigoa.online/vigowekolodozugedapidasvmgc.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/43296360571.pdfIn PDF document text
    • http://proita.fun/521605575081j1up.pdfIn PDF document text
    • http://pro-komp-master.website/73_ford_mustang_mach_1_valuevrrug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/free_adobe_reader_apps.pdfIn PDF document text
    • http://jonikabaxo.rf.gd/samsung_model_rs261mdrs_reset.pdfIn PDF document text
    • http://rijevugez.epizy.com/baal_veer_video_3gp_tinyjuke.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/kevemexikaxusaxiza.pdfIn PDF document text
    • http://vojutomozab.epizy.com/educational_psychology_woolfolk_winne_perry.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/hooke_s_law_lab_report_procedure.pdfIn PDF document text
    • http://sosozodazu.epizy.com/cascade_1000_canister_filter_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/80312756153.pdfIn PDF document text
    • http://tanozetodane.rf.gd/aecc_english_communication_book.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_off0000e89a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89A 4784 bytes
SHA-256: 5e35b28e45aa748fcfab75e10f8e18a53487765210d7882cda408a6a1425c2c0
font_01_sfnt_off0000f8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EA 9944 bytes
SHA-256: ea9715d61d91c9529d15306be32517bb35da89463a5041b072a81cb69fb4f4b6

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