Malicious PDF — malware analysis report

Static analysis result for SHA-256 642ace4e73e91894…

MALICIOUS

PDF

74.1 KB Created: 2021-01-22 05:47:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e44cd4ca98f3b0fbcb322fc3962636d2 SHA-1: bac4748a7333ada1508f9344bd5f67c03fce0fe0 SHA-256: 642ace4e73e918946e5d4aa5c071359bcfd0b43d95b0265419034e942f8d9e39
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI pointing to a download link for 'asphalt nitro apk for android download'. This suggests a phishing or potentially unwanted software distribution attempt. The ML classifier and ClamAV detection strongly indicate maliciousness, supporting the phishing attack pattern. No scripts were extracted, but the presence of a suspicious URL is a high-priority IOC.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wb?keyword=asphalt%20nitro%20apk%20for%20android%20download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375341/normal_5fc9beba6c0e8.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/hjdjicw/mazawilewirapekine.pdfIn PDF document text
    • https://cdn.sqhk.co/xadowififux/EZ3gchf/airbnb_san_diego_with_private_pool.pdfIn PDF document text
    • https://site-1083673.mozfiles.com/files/1083673/zimafikuzudoniv.pdfIn PDF document text
    • https://site-1167978.mozfiles.com/files/1167978/childrens_beds_with_slides_ebay.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447487/normal_5fc75752d9104.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373782/normal_5ff2e3540f07b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421058/normal_5fd082be0501a.pdfIn PDF document text
    • https://site-1173763.mozfiles.com/files/1173763/41694557576.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/ifhfDIl/you_are_hope_apk_mod.pdfIn PDF document text
    • https://site-1179185.mozfiles.com/files/1179185/palawigexebikimubax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/ultimo_aggiornamento_whatsapp_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/free_portfolio_powerpoint_template_for_students.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/timorulukezix.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/bikram_singha_film_song.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/kowur.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/51898594610.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/filmora_sound_effect_pack_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FA 4944 bytes
SHA-256: c6a9bca873433814e0f92251d4f469f68f8243a7f6d79c6cacd889b8d22626d2
font_01_sfnt_off0000e6b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B7 11384 bytes
SHA-256: fb145968ac3b72b716e1a119d7475f9f1c3dcff8d01e35ce06dfbe9257c07898
font_02_sfnt_off00010b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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