Malicious PDF — malware analysis report

Static analysis result for SHA-256 d328a1e465977607…

MALICIOUS

PDF

103.0 KB Created: 2021-03-17 14:43:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 606a700eaf18f7536e8538f147ff57ff SHA-1: 5f63da38190cb10ab9adb0c2d1435121978fb374 SHA-256: d328a1e4659776076f55464ceec50a0dda52169c402abc2285e81141f2a3bb11
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://kuzutuzo.ru/strik?utm_term=dunkin+donuts+menu+2020+philippines PDF link annotation
    • http://vanimerukaguto.scienceontheweb.net/neil_degrasse_tyson_quotes_the_universe_crossword.pdfIn PDF document text
    • http://nipijapogila.sportsontheweb.net/reliability_engineering_handbook_dimitri_kececioglu.pdfIn PDF document text
    • http://wgathering.org/canteen_attendant_online_formqw3ki.pdfIn PDF document text
    • https://gebedosoxabitox.weebly.com/uploads/1/3/5/3/135324181/sikelotinet-gubejedizemi-farilibofefor-govojujemir.pdfIn PDF document text
    • https://bumarotijij.weebly.com/uploads/1/3/4/6/134688095/rutolof.pdfIn PDF document text
    • http://forexgeeks.net/97150331891pybzv.pdfIn PDF document text
    • http://kyrgyztours.com/asu_map_transfere67g6.pdfIn PDF document text
    • http://rabiwitijif.medianewsonline.com/24696489462.pdfIn PDF document text
    • https://tebifenan.weebly.com/uploads/1/3/4/6/134675993/e927cede6b0e4f8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rorokepu.atwebpages.com/what_is_the_role_of_religion_in_modern_society.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/android_emulator_mac_online.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/android_linux_command_line.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/everybody_wants_to_be_a_cat_flute_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/dogevazapiwediw/castle_manor_academy_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/marriage_wishes_song_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/raisin_in_the_sun_walter_character_analysis.pdfIn PDF document text
    • http://kepagewav.atwebpages.com/calvinismo_e_arminianismo_evanglico.pdfIn PDF document text
    • http://kesupipipiret.onlinewebshop.net/99836426438.pdfIn PDF document text
    • http://kisalonokexiwi.atwebpages.com/light_reflection_and_refraction_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/screenshot_notifications_on_android.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BAF 5228 bytes
SHA-256: 87dc70518108b30de7daf4b711fa29e91e390b436b65cc8e06e9d0dba3bdd1bc
font_01_sfnt_off00014d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D5B 12432 bytes
SHA-256: 56c602e4358d1b030eeeb39da56c32cbaf85757ae692a19cb60f49838a6beba1
font_02_sfnt_off00017713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17713 16328 bytes
SHA-256: 0ad95216fc52ead1ee8e1b875c7e0507e88213f6ce6a5e96007740e231e172aa

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