Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e4e512b8ffaf6ba…

MALICIOUS

PDF

161.6 KB Created: 2021-02-20 11:45:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 296c195f195153657cc57921861dd8bf SHA-1: e3dca3c4b396c8d1d90d8049c370ab73ae003ed5 SHA-256: 6e4e512b8ffaf6badca4c3ed34758c189b7a44ae1e95760a6451e415bd87321c
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged the PDF as malicious. The document body, though heavily obfuscated, appears to be a lure related to a book title, suggesting a phishing or malware delivery attempt. No scripts were extracted, but the presence of external URIs and the overall detection profile indicate a malicious intent to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=historia+de+la+lengua+espa%25C3%25B1ola+rafael+lapesa+pdf PDF link annotation
    • https://ruzudagozigiwis.weebly.com/uploads/1/3/5/3/135394236/97bd01fb03aa9da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455376/normal_602dd0766d12d.pdfIn PDF document text
    • https://vuwezamubom.weebly.com/uploads/1/3/0/8/130814902/13ade19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393019/normal_5ff635a15e0a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378846/normal_5ffeb4030f26e.pdfIn PDF document text
    • https://xinewufovina.weebly.com/uploads/1/3/4/2/134235071/debasi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479226/normal_6007034ee9eb6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492536/normal_5fcaf40bb418c.pdfIn PDF document text
    • https://guvorike.weebly.com/uploads/1/3/4/2/134266232/0bc9781b8f3ca66.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/pafexegud/nobudigidimebetomoxaj.pdfIn PDF document text
    • https://s3.amazonaws.com/wujanozo/anarkali_malayalam_full_movie_free_cinemavilla.pdfIn PDF document text
    • http://mefirakuk.epizy.com/odia_movie_hd_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/good_night_wallpaper_shayari_image.pdfIn PDF document text
    • http://vadepik.epizy.com/81951543296.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/diwafukimapoperuv.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/software_development_life_cycle_agile_template.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00021e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21E7A 5380 bytes
SHA-256: dfc8bd2751eccc7186747f6e3a9681e009c360b738f58355d34e400339c1f74c
font_01_sfnt_off00023091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23091 16348 bytes
SHA-256: ebd35aa65f38c4ff5697c872085fdbdef97f0643cdc3969062d9cc7ffc5b6eb0
font_02_sfnt_off00026132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26132 16060 bytes
SHA-256: e378496ff4b4329e9698dc62510b77aa20d6148e4879fbbc576c593c8f820d6c

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