Malicious PDF — malware analysis report

Static analysis result for SHA-256 05bade5df045705d…

MALICIOUS

PDF

132.0 KB Created: 2021-04-22 08:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a0d05bf6c539ae0fa1a78bb643f125a8 SHA-1: 5e964831df1a01f97ba5c947b4b2ab3a51e16bbf SHA-256: 05bade5df045705d74f83489f8ff644236b20156f2aafae1ba2545d0ae45cbc6
156 Risk Score

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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/strik?utm_term=how+to+unlock+combat+knife+cod+ww2 PDF link annotation
    • https://fatomokoke.weebly.com/uploads/1/3/4/0/134098041/1489807.pdfIn PDF document text
    • https://megewesaj.weebly.com/uploads/1/3/0/7/130738707/dc4b609.pdfIn PDF document text
    • https://vegupixusenez.weebly.com/uploads/1/3/4/3/134318628/vopoput_pidukenijaven_guvuw_lufojibakarivo.pdfIn PDF document text
    • https://tagakokiginozol.weebly.com/uploads/1/3/0/7/130775172/889516.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/jevedijadiki/lemon_lime_adventures_cheat_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/34511070710.pdfIn PDF document text
    • http://lejagimu.rf.gd/navutapajunalogukoluges.pdfIn PDF document text
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_fad7b3156fa346bb85134a03a1c7d4b9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/fomasaratof.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/vlookup_example_2_worksheets.pdfIn PDF document text
    • http://dapobepopid.rf.gd/azur_lane_baltimore_gear_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/73390341528.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/full_bass_punjabi_song_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/huskisson_pictures_movie_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/can_ipod_touch_run_ios_13.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/51955365907.pdfIn PDF document text
    • http://nasedelowose.rf.gd/freelance_consultant_invoice_template.pdfIn PDF document text
    • http://takivozakafu.rf.gd/2556784507.pdfIn PDF document text
    • https://3dd85f33-233b-4b3c-8e53-142bc8307eec.filesusr.com/ugd/8df890_6728b5605310412eb2af423a2d239cc3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/xojivowolan.pdfIn PDF document text
    • https://0c6b7a74-1ca0-41da-943c-c268a208a416.filesusr.com/ugd/fef373_e80d3ea10c4f4aa994a7d5d1540a563c.pdf?index=trueIn PDF document text
    • https://bb0106b8-f3e0-414b-a873-a0e24df3f2ad.filesusr.com/ugd/b84a33_631cba3496044fadb751991514a2b72a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/simple_and_compound_interest_practice_worksheet_answers.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_off0001b6d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B6D4 5164 bytes
SHA-256: 59c5c4917c9a897f4552d4874b1722dbb2804aa017aad0a92d711d53157a612e
font_01_sfnt_off0001c866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C866 12360 bytes
SHA-256: a698eb07b8a430fa55d60176f6a34127db4d562646809fd799a5dfb39b77013f
font_02_sfnt_off0001f24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F24D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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