Malicious PDF — malware analysis report

Static analysis result for SHA-256 358878e87ab2a97f…

MALICIOUS

PDF

68.7 KB Created: 2021-02-14 11:49:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 33b302a366166302eea5af8ee5e01ac2 SHA-1: 491278c414f5bb3775fce6037996bc3d1f715b9d SHA-256: 358878e87ab2a97f134a9eb9c37b2ede5bd18f1dcc8b3a7302e073a1350b037f
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=e%253Dmc2+worksheet+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_5fd1e116e20ad.pdfIn PDF document text
    • https://jipepusubame.weebly.com/uploads/1/3/4/0/134040653/solotera.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450039/normal_5fcc9b188a1d1.pdfIn PDF document text
    • https://zopiwaseka.weebly.com/uploads/1/3/0/9/130969839/nojovi.pdfIn PDF document text
    • http://mepanawabopod.22web.org/consonant_sounds_worksheets_kindergarten.pdfIn PDF document text
    • https://rijozixofufake.weebly.com/uploads/1/3/4/5/134509282/4419077.pdfIn PDF document text
    • http://fuwakesesul.22web.org/software_to_backup_android_sms_to_computer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368474/normal_5ff4c976bb773.pdfIn PDF document text
    • https://fagadixiridare.weebly.com/uploads/1/3/5/3/135304990/situjememon.pdfIn PDF document text
    • http://logusubunovad.22web.org/canon_eos_750d_manuale_italiano.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426682/normal_5fd69b1a93ef5.pdfIn PDF document text
    • http://lozejokewoj.22web.org/tagikeluki.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/fazujo/how_to_group_two_worksheets_in_excel.pdfIn PDF document text
    • http://rakimeramut.epizy.com/milky_chance_stolen_dance_guitar_sheet_music.pdfIn PDF document text
    • http://gafopoxekog.epizy.com/jenomipuxoninivumon.pdfIn PDF document text
    • http://mevalegija.rf.gd/comparing_centimeters_to_meters_worksheet.pdfIn PDF document text
    • http://dalelotagu.rf.gd/bada_bhai_song_punjabi.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/xivuxixafani.pdfIn PDF document text
    • http://kiralemosokeze.epizy.com/practice_writing_lowercase_letters_worksheets.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_off0000ced2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED2 5300 bytes
SHA-256: 102c99eb2dbf67eae8969edf3baec68363056b1d452083d22f17d89a8b1f5a13
font_01_sfnt_off0000e0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C9 10400 bytes
SHA-256: 0ebb41f8c302de4412bc525b5e062090c5a5d0dd4253ebbb9e89874d4ddcff85