Malicious PDF — malware analysis report

Static analysis result for SHA-256 f55b69ca1fc693ea…

MALICIOUS

PDF

79.3 KB Created: 2021-04-04 07:37:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0adee320c7d3c4171a55cd281475dfe3 SHA-1: 7dc3325ed4ab9f5652df9697665bb53da5ae2e84 SHA-256: f55b69ca1fc693ea691735195e928f6aa559b69f6a472a56e7858581eca64181
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains heuristics indicating it's a phishing lure, specifically using an image to redirect users to an SEO redirector. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary IOC is the redirector URL, which likely leads to a phishing page or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://vilenefex.ru/strik?utm_term=how+to+pair+rca+sound+bar PDF link annotation
    • http://seplafond.xyz/how_to_make_a_smoothie_with_frozen_fruit_and_no_yogurtlgz6y.pdfIn PDF document text
    • http://podarokinsta.site/what_does_it_mean_if_your_smoke_alarm_is_flashing_redxtrnz.pdfIn PDF document text
    • http://lnstagramsupportingcenter.com/animales_en_peligro_de_extincion_en_el_peru_2018zf5ss.pdfIn PDF document text
    • http://jevakogubosu.22web.org/74008405562.pdfIn PDF document text
    • http://presentinsta.site/vebodakumotefiletoruredpjirh.pdfIn PDF document text
    • http://rkconstructionsucks.com/samsung_-_50_8_series_-_4k_uhd_tv_-_smart_-_led_-_with_hdrrm12b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vemewef.rf.gd/501109764.pdfIn PDF document text
    • http://gifazewuki.epizy.com/english_grammar_test_online_multiple_choice.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/74835116276.pdfIn PDF document text
    • http://notijopozij.epizy.com/lexus_rx_350_hybrid_2021.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/zemubapemipazebarurofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d0e1815-ea07-4fba-bdbb-7a5793ccb0c4/27567290791.pdfIn PDF document text
    • http://tidisel.epizy.com/84845079779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4390fe8e-c37b-49cd-a90e-6e40c9c512d5/download_five_nights_at_freddys_3_full_game_free_pc.pdfIn PDF document text
    • http://wewixokadun.epizy.com/46791080433.pdfIn PDF document text
    • http://jomajipikuxa.rf.gd/pisozero.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/bole_chudiyan_song_djmaza.pdfIn PDF document text
    • http://lememisuxelivem.rf.gd/introduction_to_solid_state_physics_kittel_8th_edition.pdfIn PDF document text
    • http://kawijawo.rf.gd/ryobi_leaf_blower_wont_start_when_hot.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/61483350831.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/talogaxufurokajujulatus.pdfIn PDF document text
    • http://zodexalanokaxaj.rf.gd/arcgis_desktop_10._5_installation_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86012db1-1507-416e-bb74-c03317a89fa7/92520129236.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_off0000f85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85E 5228 bytes
SHA-256: c5d2487ab65666734a850584470b3b70e03f44bac7d576b4959f7f06fb614698
font_01_sfnt_off00010a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3B 11052 bytes
SHA-256: 056b504c478ac2a47701628bfcea32eef74e414ec7f6aff77150cd45e722e2f6