Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a28c917a532241…

MALICIOUS

PDF

104.1 KB Created: 2021-04-23 18:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 29bc4f2bad16ba90fddb1d9e550000ac SHA-1: 79e9d06696de3523088e283c6a0ae0e5372c604c SHA-256: 09a28c917a532241fa960a5bc983d405244f7019b72f7f80c10bcc5b63678e5d
184 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirectors and a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document, likely delivered via spearphishing.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=ma+driver+retraining+program+locations In PDF document text
    • http://50offstore.pro/sample_spreadsheet_for_budgetud99c.pdfIn PDF document text
    • http://neridofufuleteg.scienceontheweb.net/31147122357.pdfIn PDF document text
    • http://niwuzukemidepiw.iblogger.org/balewadi_bus_video_songs_ing.pdfIn PDF document text
    • http://mavurelaro.22web.org/invitation_letter_for_visa_to_usa_template.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/gAjbSjb/impossible_water_bottle_flip_game.pdfIn PDF document text
    • https://cdn.sqhk.co/ximegawaso/EjfagiM/business_boarding_up.pdfIn PDF document text
    • https://cdn.sqhk.co/murafabu/e6QNigC/xotejedesubejutomalefunop.pdfIn PDF document text
    • https://cdn.sqhk.co/lukizigerex/cjcRH0x/aggiornamento_android_10_q.pdfIn PDF document text
    • http://game-pro.xyz/spotted_lanternfly_eggs_how_manylzyq0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://simifumujabiguw.rf.gd/bimixogiwigu.pdfIn PDF document text
    • https://d1897088-ef6e-4b60-8303-910b4b551fc1.filesusr.com/ugd/4cfbbd_3defcbf7a0114bc383a7944e4297b1c3.pdf?index=trueIn PDF document text
    • http://lojibovel.myartsonline.com/how_to_edit_a_large_file_for_free.pdfIn PDF document text
    • http://kurejob.epizy.com/singer_quantum_stylist_9960_bobbin_winding.pdfIn PDF document text
    • https://e4da1597-3bb3-488b-9226-7c2c9e06e9ce.filesusr.com/ugd/db5d73_7d26295d74c2450bac0e99d5cef8c8e6.pdf?index=trueIn PDF document text
    • http://delasasapujix.rf.gd/67624835559.pdfIn PDF document text
    • http://zewadomi.myartsonline.com/81958862061.pdfIn PDF document text
    • https://e31b828f-dd5d-4b35-abba-5777d5fc2ed6.filesusr.com/ugd/56a8cc_029e8ecd24e04e27884b56ad84f153ff.pdf?index=trueIn PDF document text
    • http://gumigojozupe.epizy.com/bluestacks_old_version_mac.pdfIn PDF document text
    • https://ac65beef-1c88-4b01-a948-251493ed82f2.filesusr.com/ugd/09857b_25947292899947e6ad76725214f381c9.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012f22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F22 12008 bytes
SHA-256: cb8a255fca984e6cdbf52f2629b30a354de08018e24e981965d9de21969f6760
font_01_sfnt_off0001571e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1571E 5460 bytes
SHA-256: dc4e356b3e883e80708007dcdc60f666048bca52bc8936d4f593bfd5d8ed12ba
font_02_sfnt_off000169b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169B1 12736 bytes
SHA-256: 951d077c582994d45c0939b2777ff51b0e2727569e3c44efefa9185a9d407774

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