Malicious PDF — malware analysis report

Static analysis result for SHA-256 a17b798d9bbab00d…

MALICIOUS

PDF

78.2 KB Created: 2020-12-30 14:39:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c4b50ec600863dd8a0b302eb28d2bd78 SHA-1: 3395a44443968abb99fc47dfe868201995c1f5f7 SHA-256: a17b798d9bbab00dc3b4514c232f4b6e009dccd09437e29f5e128df66db91b13
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The embedded document body, though heavily obfuscated, appears to be a lure related to "Epic 7 patch notes 6/12". The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffine.ru/strik?utm_term=epic+7+patch+notes+6%252F+12 In PDF document text
    • https://cdn.sqhk.co/tezakagadol/Ngdjeb3/77523046651.pdfIn PDF document text
    • https://cdn.sqhk.co/rowalulo/Wbbujj9/19180388262.pdfIn PDF document text
    • https://cdn.sqhk.co/mifimafonuku/yifgeAj/coin_master_free_spins_hack_android.pdfIn PDF document text
    • https://cdn.sqhk.co/sirejeforox/d5hdjbr/zizulejikokajoposuwu.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/ibhhzxP/my_business_empire.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/ie8hghe/police_siren_and_light.pdfIn PDF document text
    • https://cdn.sqhk.co/zoboxoba/gOh8idb/4fun_lite_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fasixazijaz/chdD7gg/xoruzuzugufo.pdfIn PDF document text
    • https://cdn.sqhk.co/pevelefotuve/8Ahgicm/74088604661.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceb5d594-c685-4a9a-b9fe-c296c4e47faa/macbook_screen_repair_cost_malaysia.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/carnivores_dinosaur_hunter_pro_ios_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d91d2271-7d46-4b9d-84c1-13bf8b2eebf5/mazzy_star_fade_into_you_lyrics_in_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/gadagavazoluwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9cbfc41-daec-46d0-b1b1-7613d0d3b5dc/mega_taiga_biome_minecraft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff29c02e-f090-4a43-b99d-7dc960b291b4/rlv_second_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a925b0d9-0b07-42df-8c09-8f82cf5bd9f1/spot_bot_pet_reviews.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_off0000defa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFA 5304 bytes
SHA-256: 3ba0b39cc14cc88a35d1a59a4cb256eb49954a07a0bd1e6662da9124e2452a4d
font_01_sfnt_off0000f120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF120 11408 bytes
SHA-256: 6337fc2bc7c49c011cfa912cae539bd4a735f876566cd1061fc3428b07e56b83
font_02_sfnt_off0001170b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1170B 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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