Malicious PDF — malware analysis report

Static analysis result for SHA-256 3616328f808b2d7e…

MALICIOUS

PDF

73.0 KB Created: 2021-02-26 06:51:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 67b2ed03c4713e459fdd38caac43990d SHA-1: 83e20b72945c97f48ef3638c2e105e069f76bd58 SHA-256: 3616328f808b2d7e1f801bf7e9030ce5bd4efecb076aac8bca82e3a05bd0e787
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are hosted on disposable domains and flagged as link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the nature of the heuristics point towards the document serving as a lure to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/wix?keyword=enrique+y+maria+crossword+puzzle+answers PDF link annotation
    • http://sexasuwodig.iblogger.org/is_the_keto_diet_good_for_diabetics_with_high_cholesterol.pdfIn PDF document text
    • https://cdn.sqhk.co/moxulofilose/dXKJgib/army_tanks_for_sale_united_states.pdfIn PDF document text
    • http://jofufunobek.sportsontheweb.net/noximogiwunok.pdfIn PDF document text
    • https://cdn.sqhk.co/xogedusov/6el6Chd/kixodidimovibofuk.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/algebra_de_baldor_ejercicio_98_pag_161.pdfIn PDF document text
    • http://liwurivosopap.medianewsonline.com/34433709187.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/what_is_development_biology_embryonic_and_fetal.pdfIn PDF document text
    • http://sumomubidisuwo.iblogger.org/c._p._m_full_form.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/7780954396.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/how_to_find_x_and_y_components.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/chemistry_lab_formal_report_example.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rosajeku.myartsonline.com/mefurak.pdfIn PDF document text
    • http://bitines.myartsonline.com/how_do_you_turn_a_ratio_to_a_fraction.pdfIn PDF document text
    • http://zenowalu.rf.gd/bike_blast_game_apk.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/12412893198.pdfIn PDF document text
    • http://fejiremow.epizy.com/wezojalawemezaloseke.pdfIn PDF document text
    • http://jizeketima.epizy.com/ferowanixekarijemamasas.pdfIn PDF document text
    • http://vozoxutizetu.epizy.com/nixozonamekirubonamake.pdfIn PDF document text
    • http://sivonimowonaze.rf.gd/89949440339.pdfIn PDF document text
    • http://popofisofol.myartsonline.com/char_broil_commercial_tru_infrared_4_burner_double_header.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_off0000e167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE167 5548 bytes
SHA-256: 6e5eb241b8177c2957d9e4ea6c1cff80a563f52c1f03adcf3fd0b68c8d1e2947
font_01_sfnt_off0000f451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF451 10072 bytes
SHA-256: afb460c196da74eea17e9001689e527fb662a6847e7944d9b35311eb1deda47d

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