Malicious PDF — malware analysis report

Static analysis result for SHA-256 31dcd1c9848c4008…

MALICIOUS

PDF

73.8 KB Created: 2021-05-25 12:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 841f2ef2ed2d0d1998fe4dbcdebc6390 SHA-1: 6cb6faba9f9c732842f266470cdfa862d0cc5871 SHA-256: 31dcd1c9848c400805fa1f3c31149b753e90a4b5c004665932150305d21234c6
156 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or malware distribution scheme, evidenced by a large number of external links, including one pointing to a suspicious domain (vilenefex.ru). The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites or download further payloads.

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 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.
  • 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://vilenefex.ru/strik?utm_term=batman+arkham+city+cheats+pc+trainer PDF link annotation
    • https://wojebera.weebly.com/uploads/1/3/0/7/130775791/fidojipone-gewisefixalolap.pdfIn PDF document text
    • https://vizodejow.weebly.com/uploads/1/3/4/3/134356937/054ad80085.pdfIn PDF document text
    • https://nixetamusizag.weebly.com/uploads/1/3/0/7/130740210/729393.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/faluzotixupi/secret_life_of_pets_2_cast_images.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/service_ontario_accessible_parking_permit_renewal_form.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/lutedowomuwisupiwotufuzep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ffffaae-00f3-41a0-be56-addf1420ba20/que_servicios_ofrece_un_taller_mecnico.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/20133468855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ea52577-d897-418f-83c6-a3006e0d98e3/78177125610.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8e6b216-4d97-4204-9040-813740b99ac1/getazok.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/ffxiv_leveling_guide_30-_40.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/60801418907.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14987b02-6e67-4fbc-8512-be47377c65f6/werirozefoba.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/ulysses_by_alfred_lord_tennyson_analysis_line_by_line.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9ab03ff-2d08-4387-9831-82ef393fb94b/2001_subaru_impreza_outback_sport_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c16b704-c779-4977-8d14-e04668410c1a/todirax.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/benim_hocam_tarih_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/crystal_report_php.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f99adbf-0f6c-4368-8313-d833e2f57c40/the_amazing_spider_man_2_game_free_download_for_android_offline.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_off0000e124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE124 5356 bytes
SHA-256: 1770b7265c377a5850c3f699bb04b975fdfcd240e5bd1a918b22017970bf05bb
font_01_sfnt_off0000f33a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33A 11300 bytes
SHA-256: dbbbb2d3bd63366f41b9500aecbad7182eef828fba52e53ba364d2b310ffecf8

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