Malicious PDF — malware analysis report

Static analysis result for SHA-256 22dbc07782e574cc…

MALICIOUS

PDF

85.0 KB Created: 2021-05-16 20:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 08dfe7ed18b426d7a0faa8706497c9d1 SHA-1: e9f800850690b9509aa97562eac4919a588b9548 SHA-256: 22dbc07782e574cc60d7d59f8e7c5ac10d0d22fa04ea2d7fd10955b9437c587e
134 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The document body, though heavily obfuscated, contains text related to 'Titulos de credito' which, combined with the 'SE_INVOICE_LURE' heuristic, suggests a phishing attempt. The presence of numerous external URIs, including one pointing to 'baarspo.ru', indicates the document is designed to redirect users to malicious sites, likely to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://baarspo.ru/strik?utm_term=titulos+de+credito+clasificacion+y+caracteristicas PDF link annotation
    • http://tigukifi.getenjoyment.net/42183469614.pdfIn PDF document text
    • http://dupamineni.medianewsonline.com/18761060790.pdfIn PDF document text
    • http://xevidome.iblogger.org/common_english_idioms_list.pdfIn PDF document text
    • http://jilavixit.medianewsonline.com/admirvel_mundo_novo_livro_download.pdfIn PDF document text
    • http://wusodopepufex.66ghz.com/mv_bts_anpanman_vkpop.pdfIn PDF document text
    • https://cdn.sqhk.co/luxixumogez/2vjd1jh/2022_world_cup_team_predictions.pdfIn PDF document text
    • https://cdn.sqhk.co/dodalowogiv/jeYjcge/baby_flashcards_for_toddlers_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/muwazubivotu/oAihjct/94850868686.pdfIn PDF document text
    • http://tasunixupowife.66ghz.com/xabozaxarikusuwawe.pdfIn PDF document text
    • http://fibakigefejep.66ghz.com/zedawip.pdfIn PDF document text
    • http://sikuwolawotoja.22web.org/pibumanuranobatef.pdfIn PDF document text
    • http://sojuvofud.22web.org/70254041305.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://burupopevetu.rf.gd/robert_sedgewick_algorithms_in_java.pdfIn PDF document text
    • http://fegugeg.rf.gd/joxib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6539597d-b1d7-4df7-aa8f-745f91b2c134/kotuxejelozomalejifumas.pdfIn PDF document text
    • http://zusewijoje.epizy.com/zotozaputivopifedemibibo.pdfIn PDF document text
    • http://netujodozovuda.rf.gd/27490979941.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a9073d7-d3b9-45fc-a9d6-30dc86747090/mbti_personality_type_test_results.pdfIn PDF document text
    • http://zilajib.epizy.com/mhw_guiding_lands_leveling_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0293e659-91a5-4418-a8dc-21f47ea49c91/7887029179.pdfIn PDF document text
    • http://nemenarubaz.atwebpages.com/master_of_business_administration_thesis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86af0741-639f-498a-82cb-ed05ea3e0e80/gibarurekaguxolenuki.pdfIn PDF document text
    • http://jipobemimojogot.rf.gd/halo_effect_book.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_off0000f792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF792 5068 bytes
SHA-256: bb77cf845de2ca970977758b109b4875b06b47f27b9d4046940417efdc824b4b
font_01_sfnt_off000108e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E7 11736 bytes
SHA-256: a1cb0f41de5590b1b83d8b29be342bdd07d3afad45af208de12351293c0e2b6f
font_02_sfnt_off00012ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA7 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd