Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecf3c424e227f58f…

MALICIOUS

PDF

98.1 KB Created: 2021-03-08 09:42:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 48581dff13ad8439d90b7d8071185d19 SHA-1: 8984e0e454565b46490411046bc41d8381c05aad SHA-256: ecf3c424e227f58fc9fb87cc53bb2ab91d6d2f0929e32f67161fc99d8ff8fc31
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, suggests a lure related to 'maths formulas for class 10 trigonometry' which redirects to a suspicious URL. The presence of numerous external URIs and the ML classifier's high confidence score indicate a malicious phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lozipotod.ru/wb?keyword=maths%20formulas%20for%20class%2010%20trigonometry PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452599/normal_5fd178001e204.pdfIn PDF document text
    • http://iciapp.xyz/4908611564izw3m.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/nixebiwajakag.pdfIn PDF document text
    • http://xilagima.66ghz.com/84784917530.pdfIn PDF document text
    • http://harkateine.fun/5131666188690ir3.pdfIn PDF document text
    • http://passive-income.ru/can_you_live_a_normal_life_with_adhdec05d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384820/normal_5fcaf42edcf8a.pdfIn PDF document text
    • http://worozoxiw.sportsontheweb.net/munchkin_weighted_straw_replacement_amazon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370097/normal_5ff6d3b22ae20.pdfIn PDF document text
    • http://vashastrahovka24.ru/how_to_change_avatar_photo_in_call_of_duty_mobileabk4p.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/bejeseja/difference_between_antiparallel_and_parallel_beta_sheets.pdfIn PDF document text
    • http://nosofakonitul.epizy.com/70462465524.pdfIn PDF document text
    • http://toloruware.rf.gd/baneguide_brnderslev_golfklub.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/rugul.pdfIn PDF document text
    • http://fefijenaxub.rf.gd/32661529124.pdfIn PDF document text
    • http://fogokenum.onlinewebshop.net/0-12_months_baby_development_milestones.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/balance_sheet_in_sap_business_one.pdfIn PDF document text
    • http://xewabilema.epizy.com/windows_10_mac_theme_free.pdfIn PDF document text
    • http://rozafibadajowo.epizy.com/what_do_bots_do_on_twitter.pdfIn PDF document text
    • http://vefodipox.myartsonline.com/lutonorijikidozi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C4 15852 bytes
SHA-256: cd76b33722b8e744726fd8a79c0fc92455bea59fdfb62a6863e3c4179d8ee19c
font_01_sfnt_off00012937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12937 5596 bytes
SHA-256: 3f363c16f5e161d0e893cfa1063324cf7145cce35f767940a2c5f2b2853e83fe
font_02_sfnt_off00013c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C33 11968 bytes
SHA-256: 91f6b84210f024474459c8986d93297d3cf26e03453ae2f5b9e1f29324c74edf
font_03_sfnt_off00016556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16556 16096 bytes
SHA-256: 61761e6c71fdd980502ce8a3a8cbf9590216241eb9eabe72fdf309a1c23cd3c2

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