Malicious PDF — malware analysis report

Static analysis result for SHA-256 9edab1f02fb8b399…

MALICIOUS

PDF

75.8 KB Created: 2021-03-20 10:40:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ad6c987aa1b84047fee74641776273bd SHA-1: 4ebbb88ab5bae549745ee01d30be2c87b610619a SHA-256: 9edab1f02fb8b39981da2e9e90ec6d362aa7da858c02452379807965f0f25bd4
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many pointing to disposable hosting or using UTM parameters, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to drive traffic to potentially malicious sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/strik?utm_term=john+deere+12+volt+side+by+side PDF link annotation
    • https://cdn.sqhk.co/genopeno/PjgFigT/art_wallpaper_hd_tumblr_black.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/heojbFr/memuk.pdfIn PDF document text
    • https://cdn.sqhk.co/tekunipifob/t99iaid/12474760219.pdfIn PDF document text
    • https://dofigova.weebly.com/uploads/1/3/0/8/130813881/sezosuvib-femubinubajon-suzaj.pdfIn PDF document text
    • https://birirewenojitu.weebly.com/uploads/1/3/0/8/130813362/dadunixexumiwupofel.pdfIn PDF document text
    • https://cdn.sqhk.co/jomonufo/ighejdj/adderall_dosage_by_weight.pdfIn PDF document text
    • https://cdn.sqhk.co/tubawonidas/Myihxji/zarimetiluvonazusarari.pdfIn PDF document text
    • https://cdn.sqhk.co/wumerelup/ghhfbV5/modern_resume_template_free_indesign.pdfIn PDF document text
    • https://cdn.sqhk.co/wepiwojeta/hjDumAs/football_championship_game_tonight.pdfIn PDF document text
    • https://sofotegepure.weebly.com/uploads/1/3/4/5/134522016/216c4b6aa696ef.pdfIn PDF document text
    • https://cdn.sqhk.co/texirova/cjahbvX/hack_jurassic_world_tm_the_game_android.pdfIn PDF document text
    • https://fisadurubimu.weebly.com/uploads/1/3/1/4/131409264/c657de9.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutesilo/bYejhiS/english_grammar_worksheets_for_grade_4_with_answers.pdfIn PDF document text
    • https://silujufadusume.weebly.com/uploads/1/3/1/1/131164496/e12d2ed4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tejasufezo.rf.gd/best_discount_app_for_hotel_booking.pdfIn PDF document text
    • https://bd5e8a39-7345-4d1c-b933-e8ec171ec4b0.filesusr.com/ugd/2dab9e_25fa108ac38b44cf802d4cf0f93a4282.pdf?index=trueIn PDF document text
    • http://kiduxoz.epizy.com/30740512726.pdfIn PDF document text
    • https://8b83d164-5e56-46cc-b941-48f48810ddf3.filesusr.com/ugd/76ce43_63129f1feeb74a9e9bc6b4440f8c8b7e.pdf?index=trueIn PDF document text
    • http://xadifoduboboriv.rf.gd/51240307544.pdfIn PDF document text
    • https://da5bec28-7969-4117-8ffb-5069fce5e80c.filesusr.com/ugd/31593d_3ac722d9952a44728bd289c06f81ae2e.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_off0000e9b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B3 5180 bytes
SHA-256: 9a8eee3b9bbd188061f2794643f458e2cb2f01b7fa6a8397b4cc2be72db02f4e
font_01_sfnt_off0000fb57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB57 11212 bytes
SHA-256: c8212e7e056f4692007388798e0e11ca56d4133554b4049d868d4e2259e341f8

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