Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0431aa4b484445…

MALICIOUS

PDF

76.6 KB Created: 2021-04-07 09:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f7da35e870f8260092c90dc114b2259c SHA-1: b2d0dfbe877cd353606499358d541cdee06f46c4 SHA-256: 0f0431aa4b48444523f884833afba73dd98356734dcf9241a96617647e1b2b04
136 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a high-risk heuristic indicating an SEO redirector link, which is a common phishing lure. The embedded URL `https://vilenefex.ru/strik?utm_term=best+class+to+play+in+diablo+3+reaper+of+souls` likely leads to a malicious site designed to trick the user into downloading further malware or providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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=best+class+to+play+in+diablo+3+reaper+of+souls PDF link annotation
    • https://cdn.sqhk.co/jesotipo/PhfMOgf/cach_quay_clip_bi_n_hinh_tren_tiktok.pdfIn PDF document text
    • http://nepatokada.mypressonline.com/zubokivewuzerot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477401/normal_605d9d24cc0d5.pdfIn PDF document text
    • https://cdn.sqhk.co/bosesegivu/YiaiivD/football_predictions_soccervista.pdfIn PDF document text
    • https://cdn.sqhk.co/muzedikerum/xqVjchc/horizon_zero_dawn_pc_camera_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/jchieg6/negiloribe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369922/normal_60556bf9f12f6.pdfIn PDF document text
    • https://cdn.sqhk.co/rapigufagi/igicWji/best_buttercream_frosting_recipe_for_decorating_cakes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gulapore/16961413908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49b70a64-1ac6-408c-99ad-a195f506f0e7/how_often_do_babies_poop_breastfed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba36f523-96dc-4940-a4b2-1c7175d9d91e/minuet_in_g_minor_bach_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/bilubojogapaxusura.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/44336358374.pdfIn PDF document text
    • http://baletax.onlinewebshop.net/definition_of_symbolism_in_literature.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/navevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5df10f7b-3361-45f4-8bbd-e90f35377bde/the_texting_bible_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cecca4f-a49f-46d4-9d32-6f8875b7d786/gedolela.pdfIn PDF document text
    • http://begujewirefe.myartsonline.com/88822021060.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30891823-1b00-4ef1-804c-13312bef5560/the_sea_of_monsters_chapter_1_summary.pdfIn PDF document text
    • http://jimarol.myartsonline.com/56848628291.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/history_of_benin_empire.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_off0000ec2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2A 5604 bytes
SHA-256: 43a1f2e0cf1bb00860ab0b56a647ad4d319ce26248283f47f36db3bf39380bb5
font_01_sfnt_off0000ff4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4D 10444 bytes
SHA-256: aec8af5170d00e1589f1a7e5c22229d149ce457667fb0d0affc37b8e5d2e015f