Malicious PDF — malware analysis report

Static analysis result for SHA-256 95686adb06ebf15a…

MALICIOUS

PDF

89.8 KB Created: 2021-02-24 15:39:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 8e9ffee8c14c3013696426a72d860ad6 SHA-1: a55f4a506c161b2bdd1019302b7338837b807215 SHA-256: 95686adb06ebf15ae9e1cf7873119bc29953dd2e8b9d436c42c927ad1968ba17
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links pointing to disposable domains and known redirector infrastructure, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious redirection, likely to a second-stage payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=dolls+house+furniture+sets+ebay In PDF document text
    • http://menbp.online/beyond_bigger_leaner_stronger_challengec12ce.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/1_4_de_metro_es_igual_a_cuantos_centimetros.pdfIn PDF document text
    • https://rudixesawemes.weebly.com/uploads/1/3/1/1/131163949/waruvoko.pdfIn PDF document text
    • http://reflectionss.space/personal_statement_for_medical_school_exampleskdcba.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/why_is_my_dishwasher_not_fully_draining.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/13514572909.pdfIn PDF document text
    • https://lizelizana.weebly.com/uploads/1/3/1/4/131409616/woteg_ronuvuzi_rapomib_lebaxiwabawinu.pdfIn PDF document text
    • http://quickpapp.online/partenogenesis_pada_lebahm1cb6.pdfIn PDF document text
    • https://nujetamewude.weebly.com/uploads/1/3/4/8/134881912/rexokaf.pdfIn PDF document text
    • https://cdn.sqhk.co/ridasozewe/9ZuPhaL/rapoluzan.pdfIn PDF document text
    • http://bestplacefor.rest/potewojurixoxuwegay0t7t.pdfIn PDF document text
    • https://cdn.sqhk.co/vemunaxudug/iaqzZCT/miranoratenefubej.pdfIn PDF document text
    • https://cdn.sqhk.co/zozimevoket/hg5njb8/53144641186.pdfIn PDF document text
    • http://digosige.mywebcommunity.org/how_to_drive_a_trailer_in_offroad_outlaws.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tefetuzuzip.myartsonline.com/john_deere_compact_tractors_near_me.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_off000110bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BC 4976 bytes
SHA-256: 0140d790124fba53b278d6e2caa801ed36e24bbd79146954401c6bd808ffd40d
font_01_sfnt_off000121a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A4 11952 bytes
SHA-256: e9f36c4ff007f3eadab95d4c105b0eff0d586e07cef7efb6fb8285c455b7be7c
font_02_sfnt_off00014a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A53 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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