Malicious PDF — malware analysis report

Static analysis result for SHA-256 81233a57915dc45c…

MALICIOUS

PDF

122.6 KB Created: 2021-04-07 20:38:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d44314efab894fb5dcbf360a89d41411 SHA-1: c279b2d8e850151a459216906e73a83d3416e2cf SHA-256: 81233a57915dc45c24365cb25c053f37d8323146eb344575978fa8264e196683
104 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 presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://golowaki.ru/wix?keyword=yu-gi-oh+duel+generation+mod+apk+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4458849/normal_5ff1feb907dbc.pdfIn PDF document text
    • https://cdn.sqhk.co/desavusomo/ebghNrj/2291803246.pdfIn PDF document text
    • http://d2-club.ru/82278586698ewti3.pdfIn PDF document text
    • http://habirovradik.ru/50330830537i6sla.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423154/normal_6003de687d6a9.pdfIn PDF document text
    • https://cdn.sqhk.co/vexedobasof/TZ6Zdeb/39278292607.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447089/normal_5fd100bcc6bfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489407/normal_605ff861b0269.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470040/normal_604b21b8d6c96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488323/normal_6033ae46923ec.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/23vs3jf/10026470982.pdfIn PDF document text
    • http://chategratis.online/polk_audio_12_inch_subwoofer_home_theater7b68b.pdfIn PDF document text
    • https://cdn.sqhk.co/kerametunal/S6Siegg/wovopapesubumedapimi.pdfIn PDF document text
    • https://cdn.sqhk.co/kimejijomaki/DZhbhjo/centurylink_t1_support_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/zetoreli/gePifih/z_nation_cast_addy.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/kWimhbG/micro_wars_battle_arena_decks_kyurem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421768/normal_60550d576d4f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369640/normal_600456586ee6b.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/apsidEJ/island_wars_2_crack_download.pdfIn PDF document text
    • https://cdn.sqhk.co/romemanir/mjehiid/free_business_case_templates_excel.pdfIn PDF document text
    • https://cdn.sqhk.co/dafisuwikib/jcaRji6/metal_horror_escape_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413236/normal_5fe568a697dd9.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/kujesulad/27270000198.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/devijomalekovavebit.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/biwabotaxotebija.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001a5e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1A5E4 29952 bytes
SHA-256: 46353f727c8a033427eefa1a8c3e3f08262de2e51c7f1c080d66573ef32e0460
font_00_sfnt_off00015c95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C95 2880 bytes
SHA-256: b90b109c34db9b2d961be312c0c64f13ba4f5af9c83d6ae4556a72cb7f468167
font_01_sfnt_off000166d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166D3 5428 bytes
SHA-256: bf18325ad9f06d4bf4febc6ae5719697ccaddfef2d910f0d54a5c671e0ef8fff
font_02_sfnt_off0001793a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1793A 15692 bytes
SHA-256: c1d8bc2d67d8b64b9f8f50103ac1242497186f3f35de7937d31993040cb00f54

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