Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d6e96eb95d154a…

MALICIOUS

PDF

84.3 KB Created: 2021-03-14 12:10:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 543fff89405e2bcfe5cfc239691a9bf3 SHA-1: 6005acf9935d4473ccc5e80ba4698563d98ff4fb SHA-256: 54d6e96eb95d154a5bdffd44a6ebe95c54fab76db29e0b56aaeb947fdf52c56d
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 and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, with a primary suspicious URL pointing to 'jumiwimov.ru', suggesting a phishing or malware distribution attempt. The presence of a link farm on disposable hosting further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/award?keyword=clinical+hematology+steininger+pdf+download PDF link annotation
    • http://alternativeinfluencenetwork.net/20980366300f36sm.pdfIn PDF document text
    • http://senteber.site/ralowizufexirevavapiq9lyk.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/liftmaster_3800pld_keypad_programmingd5jpg.pdfIn PDF document text
    • https://cdn.sqhk.co/fimirexuf/ljd5ghD/pezozidubilixobizi.pdfIn PDF document text
    • http://3gusevshop.space/formato_de_nomina_en_blanco_para_rellenar_excel_mexicopttki.pdfIn PDF document text
    • https://cdn.sqhk.co/wikelere/1EZhaaj/block_strike_all_promo_codes.pdfIn PDF document text
    • http://bettermoneytips.com/dungeon_crafter_downloadrrgcb.pdfIn PDF document text
    • https://cdn.sqhk.co/tusujoxaseru/dgegdIR/88201977599.pdfIn PDF document text
    • https://cdn.sqhk.co/matijamaj/haqjijf/little_panda_jewel_adventure.pdfIn PDF document text
    • http://esclub.info/the_penelopiad_quotes_about_helen1diul.pdfIn PDF document text
    • https://cdn.sqhk.co/girolivudafo/jjOlHig/new_song_2020_neha_kakkar_dj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/16bfebb9-4eb0-4aca-be41-26f48d9feee4/what_is_the_best_battery_powered_grass_trimmer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf0fb615-60a4-454c-b3a1-4f6a5e7351b3/how_to_set_ecowater_water_softener.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/xerigisipisetepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72a7a948-d5b7-4c63-ab38-fa0222cb960b/Life_Together_Fellowship_Throggs_Neck_Campus_East_Tremont_Avenue_The_Bronx_NY.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b255ff4-d3ff-4f4c-98e6-8774c88f9be7/44308505286.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/battery_tender_800_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25045d7a-f592-4152-bddc-dedd5643733f/7835715609.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdba7204-b88b-4ff4-b0ea-ee7f4fe76cbb/pumipus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3960093d-d6cd-49f8-9027-2b78ed66f11b/how_to_drain_brewer_on_keurig.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/investigation_report_template_excel.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000119f1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x119F1 23304 bytes
SHA-256: 8dd4cbf7e204a395fc33c933435e1d9833bcf9e7d3a78b1393243572f974e337
font_00_sfnt_off0000e33f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33F 5668 bytes
SHA-256: e228287fba3eb8eadde517b7bea935f8ed4698c1c0da18940486fe8b8578ea67
font_01_sfnt_off0000f66e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66E 10320 bytes
SHA-256: 2bec14fc58964fa7ebcaa7820c8737b6257a9b600df8ceee9dfdcac3bb80dbe1