Malicious PDF — malware analysis report

Static analysis result for SHA-256 0924d30c6eee2fe4…

MALICIOUS

PDF

100.1 KB Created: 2021-06-02 07:27:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e2fed9b4245acac2aacdd8049a5d7595 SHA-1: 52fea0eae8dfe1c40b34c2a5194dbe9544a0499b SHA-256: 0924d30c6eee2fe4f95c76d3d068666ba1c80f8d77303c7687011184a036deb4
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, and is identified as a link farm. The primary malicious activity appears to be directing users to external, potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://midufefew.ru/123?utm_term=foreign+plural+form+of+bacteria PDF link annotation
    • https://wivamugetatiwaw.weebly.com/uploads/1/3/1/1/131164202/87d6f1b04.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4489981/normal_60b5c54ee87ec.pdfIn PDF document text
    • https://vapatukubarokul.weebly.com/uploads/1/3/0/7/130739856/e0514bcb16dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450356/normal_60215db4a4853.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421934/normal_600a0fda5be59.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450038/normal_5ff16d839bfa0.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4455907/normal_60b6943b8e8bf.pdfIn PDF document text
    • https://vugogirofezufus.weebly.com/uploads/1/3/4/3/134355312/3229829.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383794/normal_605bbe2f16830.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417212/normal_600847a11490a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458417/normal_6064001a2e76f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393035/normal_5fe7d9ea99b6b.pdfIn PDF document text
    • https://zidepodip.weebly.com/uploads/1/3/0/7/130775192/8b10e1a16f.pdfIn PDF document text
    • https://duvupobilalef.weebly.com/uploads/1/3/4/6/134630448/pozokomumika.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nunaruribeg.pbworks.com/f/how_to_repair_a_swiffer_wet_jet.pdfIn PDF document text
    • http://pupowivala.pbworks.com/f/i_am_a_rider_mp3_song_free_download_320kbps_masstamilan.pdfIn PDF document text
    • http://zufogopojut.pbworks.com/w/file/fetch/144489270/written_in_my_own_hearts_blood_chapter_summary.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/f/game_ultraman_fighting_evolution_3_ps2_iso.pdfIn PDF document text
    • http://kibumezi.pbworks.com/w/file/fetch/144455277/multiplication_table_worksheets_for_grade_3.pdfIn PDF document text
    • http://sinorodolu.pbworks.com/w/file/fetch/144481299/muvegomav.pdfIn PDF document text
    • http://pefagisunel.pbworks.com/w/file/fetch/144488793/zeterokarafubalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5a19844-a2aa-4c9e-b23b-ee0be458038a/why_does_atp_store_energy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b1bd784-32de-44ff-986c-e34ca2fbf812/can_you_cook_rice_in_a_multi_cooker.pdfIn PDF document text
    • http://sokulus.pbworks.com/w/file/fetch/144476484/how_much_do_speech_therapists_earn_in_australia.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001383c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1383C 5252 bytes
SHA-256: 8c8ac6bbf80343ee79a6999d608b9b5c2c68c6f50ae87e0bc3fcdac68d4e3624
font_01_sfnt_off00014a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A0F 20240 bytes
SHA-256: 377468b3fd3af4170cfeaf98cf11a982693403bf5eefa1082a6e18c32844da2c