Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e261385994cd664…

MALICIOUS

PDF

75.0 KB Created: 2021-02-16 11:45:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8cae4dcb874b650c09956fb69a28d66b SHA-1: 3d585a29b85d980a9808613526d460a1c9e100a6 SHA-256: 1e261385994cd664f5907df58d31ae8c946d9db771e995a167a9cc0b67e04d63
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains keywords related to technical drawing pens, likely serving as a lure.

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/wb?keyword=technical%20drawing%20pens%20rotring PDF link annotation
    • http://rejonanujezeke.22web.org/51390287284.pdfIn PDF document text
    • http://copyright-supporthelp.com/68259941180dm0ld.pdfIn PDF document text
    • http://zalewef.iblogger.org/mibosalajo.pdfIn PDF document text
    • https://cdn.sqhk.co/vibesadebo/jwibgdX/goxabotunaremudosefas.pdfIn PDF document text
    • http://vemasujananexu.22web.org/suwedisipezupu.pdfIn PDF document text
    • http://lidagejelotodu.22web.org/26403146368.pdfIn PDF document text
    • http://minomesiguziv.22web.org/cakewalk_sonar_x3_producer_edition_free.pdfIn PDF document text
    • http://funofuzifige.iblogger.org/ziseta.pdfIn PDF document text
    • http://muritolovaj.iblogger.org/48621599411.pdfIn PDF document text
    • http://nat-fru.space/sony_vegas_pro_15_serial_numberitrhx.pdfIn PDF document text
    • http://geniputan.66ghz.com/89449290379.pdfIn PDF document text
    • http://lifeshop.pro/mac_tools_plasma_cutter_pca_30_pspl8ic.pdfIn PDF document text
    • http://detonicinitalia.website/nepazakojotuwexub9ko2v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vobisobopimab.epizy.com/kadipinekoz.pdfIn PDF document text
    • http://lobidirubegevil.epizy.com/miracle_box_2._82_crack_loader.pdfIn PDF document text
    • http://ladisopezaxak.epizy.com/intramuros_map_tour_guide.pdfIn PDF document text
    • http://zifawikixeliba.epizy.com/sajuxeluvoduwip.pdfIn PDF document text
    • http://jipokogave.epizy.com/jubilate_everybody_sheet_music.pdfIn PDF document text
    • http://juwejaju.rf.gd/insuficiencia_cardiaca_aguda_y_cronica.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_off0000e65f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65F 5376 bytes
SHA-256: 92932f463b1b738079977946f12396395ef2f441b37e87ed146b00cfaf050f9f
font_01_sfnt_off0000f8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B5 10808 bytes
SHA-256: f485d8f9c769a9249d99da57bbedb36e9eea69ce191080d2771ac0cb01ab685d

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