Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4320a9f1a47c010…

MALICIOUS

PDF

77.7 KB Created: 2021-04-29 07:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d037db4a3ed9c59b3541c17d26441ac6 SHA-1: 9cac6b11853f02260063e7576014206e56c56742 SHA-256: b4320a9f1a47c010cf092b2020e6ab2cd7adc46d3e5ad19a6e806cfebd58dffa
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://druttle.ru/strik?utm_term=65+inch+samsung+tv+wall+mount+walmart PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403689/normal_603a623874199.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402712/normal_5ff7b1bf9cf16.pdfIn PDF document text
    • http://shmelev.pro/man_down_lyrics_shakka1fb04.pdfIn PDF document text
    • http://gupirod.iblogger.org/occupational_health_and_safety_risk_management.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450139/normal_5fdf1ef1cbec3.pdfIn PDF document text
    • http://jigunemav.22web.org/7922768341.pdfIn PDF document text
    • http://ogranicbio.space/vinojonunozizozip4ksos.pdfIn PDF document text
    • https://cdn.sqhk.co/badalozebale/cTieAG0/90795246652.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/2ihw7vG/skyblock_servers_like_hypixel_mcpe.pdfIn PDF document text
    • https://cdn.sqhk.co/bogovureg/qfuidhe/silicon_valley_season_6_review_ign.pdfIn PDF document text
    • http://sobakin.space/tomb_raider_game_2020_guide33iyl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490534/normal_5fcecb94b965c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484355/normal_6054c5c8ab594.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/nodetuxapabara/savinaru.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/74771702095.pdfIn PDF document text
    • https://16564176-4c62-44d7-82e3-1dea6b832d73.filesusr.com/ugd/5e57cf_f6818cdbd1b8418e827e4b51d9351517.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/59316125209.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/apple_magic_mouse_2_battery_charge.pdfIn PDF document text
    • https://1de4b56a-3309-4767-83a2-f1bb1ea7c594.filesusr.com/ugd/a6e5e9_5808d5e671504b5097e448dca5f9716b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wejuvono/16345427435.pdfIn PDF document text
    • https://be08d7d4-326a-4801-be9d-4496af17a43b.filesusr.com/ugd/d31907_f7ae775178074389bc1bdda7c6a957df.pdf?index=trueIn 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_off0000ef8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8D 5548 bytes
SHA-256: f33f108e22798d888ac982b9d604cdbc2185d2c3c6ff3130d43bfc3836610260
font_01_sfnt_off00010259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10259 11464 bytes
SHA-256: dee099e258be4ddbeecc1927f391122bd58803f27e56b6fa46d9cb15d1c5f40b

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