Malicious PDF — malware analysis report

Static analysis result for SHA-256 73e48efa4215da57…

MALICIOUS

PDF

82.0 KB Created: 2021-04-26 17:25:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b6669fa1c789fc4c4b6cd2470f241dd SHA-1: 50d31998328e3f85b086a7bc1e7bdd376ad18ee4 SHA-256: 73e48efa4215da57e91de6497ba0f96c35bd1770804371ad2904a973f19b0c69
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One of the primary external URIs points to 'https://xezojetit.ru/strik', which is likely a phishing or malware distribution domain. The presence of multiple benign-looking PDF links in conjunction with a suspicious URL suggests an attempt to disguise malicious intent. No scripts were extracted, but the overall structure and heuristics point to a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/strik?utm_term=casio+g-shock+ga-ga150mf-8adra
    • https://cdn.sqhk.co/finelega/jeHieqz/84035214698.pdf
    • https://cdn.sqhk.co/geroterunetu/qF77jje/night_of_the_full_moon_witch_guide.pdf
    • https://cdn.sqhk.co/zinazejoras/idliiW8/80976818449.pdf
    • http://tugejavutot.22web.org/adobe_acrobat_pro_convert_scanned_to_text.pdf
    • http://vabetovopux.66ghz.com/tosinojawuxojuziwad.pdf
    • http://tasefuvakol.22web.org/52311986069.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://bomowufawifebi.rf.gd/18115602656.pdf
    • http://kazixovo.rf.gd/calendar_template_financial_year.pdf
    • https://s3.amazonaws.com/wovugi/logitech_harmony_smart_control_universal_remote.pdf
    • http://sikovisata.rf.gd/58527778563.pdf
    • https://s3.amazonaws.com/gomakobez/building_construction_book_bc_punmia_free.pdf
    • https://s3.amazonaws.com/lulelepese/jinozusedavogetabibus.pdf
    • https://s3.amazonaws.com/nijosinizo/how_to_flex_abs_while_working_out.pdf
    • https://s3.amazonaws.com/gotitibekovi/cadillacs_and_dinosaurs_full_version_apk.pdf
    • http://kukuzetu.rf.gd/do_you_need_an_associates_degree_to_be_a_real_estate_agent.pdf
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_22d81d5792ba489988a749ac845eda20.pdf?index=true
    • https://s3.amazonaws.com/garorowa/sagonela.pdf
    • https://7afd96e6-4611-46d4-9b98-d111b897c281.filesusr.com/ugd/154221_6815e1250efe436bbf556973e7bd765f.pdf?index=true
    • https://9329dc78-1a6b-4cc7-98ac-1b36262b7dd5.filesusr.com/ugd/d2be55_06cd8c0e818d4e58bd3f0297c634daf8.pdf?index=true
    • https://s3.amazonaws.com/tobobowu/choy_lee_fut_forms_list.pdf
    • https://s3.amazonaws.com/gazijewevan/holy_quran_in_english_audio.pdf
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_d3a3b5589bb74b8d92f43a73f1a093ef.pdf?index=true
    • https://s3.amazonaws.com/nigimul/flinn_safety_quiz_answer_key.pdf
    • http://gozukuga.epizy.com/animal_cell_and_tissue_culture.pdf
    • http://visegob.epizy.com/al_quran_16_line_taj_company.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5f9.bin
633dd40e2b3e3cb750ada189b687439b16bcc60570564084ba9324aeefeabafa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F9 5520 bytes
font_01_sfnt_off0000f8c5.bin
06dfb807b3cbb50ef18405ac42f182601cc2d8e196fedaefe0b1c1adb2119dc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C5 22032 bytes
font_02_sfnt_off00012a89.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A89 4324 bytes

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