Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cd24dfdf49e7414…

MALICIOUS

PDF

68.6 KB Created: 2021-03-03 19:42:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 8be3663a8a96c5df48ad91faee896a71 SHA-1: 73b890200b38cd625c75a80541f42369c3a9b4b1 SHA-256: 1cd24dfdf49e741454a97e929d232f7a585297ea01ba637398d9bf38b4025714
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' and an ML classifier indicating maliciousness. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing attempt. One prominent URL, 'https://jottigo.ru/wix?keyword=earth+science+chapter+21+review+answers', is presented as a search result, likely to deceive users into clicking through to a malicious site. No scripts were extracted, but the PDF structure and URL distribution strongly indicate a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=earth+science+chapter+21+review+answers PDF link annotation
    • http://carins.info/how_to_set_car_alarm_sensitivity69d7x.pdfIn PDF document text
    • http://jawixogu.mygamesonline.org/waselokakiwokekiwanoj.pdfIn PDF document text
    • http://googsnat.space/chemistry_lab_report_outline3nen9.pdfIn PDF document text
    • http://juzufezike.mygamesonline.org/8537134811.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389090/normal_600dbd1db4952.pdfIn PDF document text
    • http://ruzagasaz.iblogger.org/92215330850.pdfIn PDF document text
    • http://dabukim.mygamesonline.org/ssr_125_automatic_review.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/how_to_clean_bose_wave_radio_cd_player.pdfIn PDF document text
    • http://tebapewulodafe.getenjoyment.net/pictures_of_hollis_woods_cast.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485156/normal_5fd2df9992f8d.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/roland_td-11kv_drum_set.pdfIn PDF document text
    • http://kigowamukidiba.iblogger.org/budget_2019_highlights_in_tamil.pdfIn PDF document text
    • http://pimavegi.22web.org/15140215106.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448539/normal_601b7828a7f53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416790/normal_5fd795d3749f1.pdfIn PDF document text
    • http://dodemul.mygamesonline.org/17216075579.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://girifatu.rf.gd/are_omron_blood_pressure_monitors_fda_approved.pdfIn PDF document text
    • http://wufagezigedo.onlinewebshop.net/metro_2033_exodus_good_ending.pdfIn PDF document text
    • http://suwotewi.epizy.com/54179400473.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_off0000d0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F3 5284 bytes
SHA-256: d83986e68987be10925c4dd91019d4cb82d327d4a9863443ef98be45f17e97af
font_01_sfnt_off0000e302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE302 9904 bytes
SHA-256: 3ea0d04cd3e6d9fd7d5291e55190542564a83c173ed6942586627654bf280808

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