Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ef6028fe654f8f…

MALICIOUS

PDF

75.1 KB Created: 2021-03-20 18:34:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d7ce3fc3c971ab80d7b4b2555b78ce7 SHA-1: 824899e343a1d3ff5e06db785cf8f53c67cfdbc9 SHA-256: 12ef6028fe654f8f12efe19f85adbc7a05bd79d458c1b311a392d6c2f66163e1
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily corrupted, contains references to a generator price, suggesting a lure. The presence of numerous external URIs, including one pointing to 'jumiwimov.ru', strongly suggests this PDF is designed to redirect users to malicious websites for phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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/strik?utm_term=honda+6500+inverter+generator+price
    • https://cdn.sqhk.co/simosukolevo/6Gifwhb/contract_killer_apk_data_free_download.pdf
    • http://nupewijanetari.medianewsonline.com/99438836305.pdf
    • http://vatidenow.medianewsonline.com/nibowefivadurezil.pdf
    • http://jedugefipevama.iblogger.org/anthony_de_mello_the_way_to_love_quotes.pdf
    • https://cdn.sqhk.co/pananumujo/ejeif9J/nuwoxit.pdf
    • https://cdn.sqhk.co/baresupujar/suhaje2/1502195279.pdf
    • http://nanonewe.scienceontheweb.net/miwunim.pdf
    • http://reredikulole.22web.org/iso-_line_lab_hgb_answers.pdf
    • https://cdn.sqhk.co/xekemini/iijLUij/how_to_draw_baby_yoda_eyes.pdf
    • http://dipurenirexo.22web.org/platform_adviser_fee.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fuxazulofonu.epizy.com/fozoximeduwolo.pdf
    • http://mozaninukokefef.onlinewebshop.net/socialisme_utopique.pdf
    • http://jemileti.atwebpages.com/android_stuck_on_startup_screen.pdf
    • http://jezevenakos.myartsonline.com/burris_eliminator_3_nz_price.pdf
    • https://s3.amazonaws.com/mogedozara/26442562652.pdf
    • http://zixagoku.rf.gd/how_to_change_a_wii_dvd_drive.pdf
    • https://s3.amazonaws.com/palevijuj/how_to_become_a_medical_lab_technologist_in_ontario.pdf
    • http://wojibikifi.myartsonline.com/praying_to_die_reddit.pdf
    • http://fisuzes.epizy.com/sojawu.pdf
    • http://bofoguvixevijin.epizy.com/konosuba_light_novel_volume_18.pdf
    • https://s3.amazonaws.com/sowirutelevolur/work_instructions_template.pdf
    • https://s3.amazonaws.com/pasutiz/gepirulopez.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e791.bin
c9c8bf56e729084cc5c358ba1a7fb52a6cd7eb72ca5479fe6064ec723067dd28		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE791 5472 bytes
font_01_sfnt_off0000fa40.bin
e5eda72f10f634ef4865a4e36c4cc6d97cf02a36ba5a54d27110a4e3706d7389		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA40 10816 bytes

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