Malicious PDF — malware analysis report

Static analysis result for SHA-256 e600d7a7db026ac9…

MALICIOUS

PDF

76.8 KB Created: 2021-03-27 18:02:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 276c5e3c921519f2b387cc4191204104 SHA-1: f29f33b59cac59e33e9067cd2cde251df123528c SHA-256: e600d7a7db026ac9114bea1f19fe7655e4b043e7fac51217934ebaf4b6ddf999
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by heuristics as a link farm on disposable hosting. ClamAV detection and ML classification strongly indicate maliciousness. The document body, though heavily obfuscated, suggests a lure related to 'persuasive writing techniques ks3 pdf' to drive users to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/award?keyword=persuasive+writing+techniques+ks3+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377100/normal_6056dda8390ff.pdfIn PDF document text
    • http://pocki.top/how_to_install_evenflo_infant_car_seatqgxvo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446765/normal_600bc57c5ea25.pdfIn PDF document text
    • http://bathforlegs.xyz/netbeans_java_config_file4ftj0.pdfIn PDF document text
    • http://hookup158.fun/bosch_classixx_washing_machine_servis27e5.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/2006_honda_civic_si_invidia_exhaust590d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390371/normal_5ff161383bdd2.pdfIn PDF document text
    • http://megalit-korolev.ru/839901750047t6yw.pdfIn PDF document text
    • http://samyog.ru/nomidixilonidozunuz181re.pdfIn PDF document text
    • http://13millions-warzone.store/octoprint_gcode_scriptscyzwh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444853/normal_5ff896f5cb849.pdfIn PDF document text
    • http://lifegirls.site/coleman_powermate_ultra_2500_watt_generator_reviewm3jeb.pdfIn PDF document text
    • http://ita-talia.fun/aviva_personal_income_protection_application_form5qtki.pdfIn PDF document text
    • http://jsexj.fun/verizon_g1100_extender5ftwd.pdfIn PDF document text
    • http://disconto50.pro/how_to_use_char_broil_propane_smokerb6qib.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/bupesejirijejus/37649107179.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/javascript_blob.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/sars_business_travel_logbook_excel_template.pdfIn PDF document text
    • https://16fd3b15-5541-4454-9538-28daacbf497e.filesusr.com/ugd/e32576_aa09a7205ffe4ce2bca5f900669bd2d1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/debiwelof/agriculture_college_in_maharashtra.pdfIn PDF document text
    • https://4bbf79d8-97e4-42de-9a75-948158c354f0.filesusr.com/ugd/52f5d3_fea9e2f2b9454ec582a428860fa4fe9e.pdf?index=trueIn 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_off0000ebd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD6 5892 bytes
SHA-256: af01afc719bd1b4b8a14932969ab8c8d09634f56a17fe24f9b9ea58d12827f47
font_01_sfnt_off0000ffec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEC 10620 bytes
SHA-256: 2fd72498537cc53e9529a97adea1dfc80466365f04d5a0cbf49164ea135e4fd7

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