Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade03d1b4478e9ad…

MALICIOUS

PDF

70.4 KB Created: 2021-03-08 21:45:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 91c8737335cdccb1fdb205fc25198f8e SHA-1: 8189589837e2935febbee8ccadaea2e1e398f867 SHA-256: ade03d1b4478e9ad3c399eadc00b6a800ef2f7a2ca50a323491aeccf5aecfaf0
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains multiple embedded URLs, with one specifically pointing to 'baarspo.ru/award', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'sociologie pdf', indicating a lure to disguise malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/award?keyword=buri%25C3%25A1nek+sociologie+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393631/normal_5fe34ceb993ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475854/normal_60244623c558d.pdfIn PDF document text
    • http://mazers.fun/tajekunemepoxebu8bdq6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479710/normal_602ea3543ac08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_6029acc8a4f3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500208/normal_5fca43499b8ff.pdfIn PDF document text
    • http://joretuvivofip.22web.org/danalalizowonosabikerigup.pdfIn PDF document text
    • http://instapriz.website/boot_camp_6_windows_10m2sbx.pdfIn PDF document text
    • http://ledukamu.iblogger.org/19259711706.pdfIn PDF document text
    • http://genoray.pro/asphalt_nitro_apk_download_for_pc_windows_7ja9gg.pdfIn PDF document text
    • https://cdn.sqhk.co/gebunemif/P8pjehj/wulekagufukorunudu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388065/normal_60127757d9745.pdfIn PDF document text
    • https://cdn.sqhk.co/wufotubi/gHjbP1M/pupobuzerigavutug.pdfIn PDF document text
    • https://cdn.sqhk.co/korulifesewa/jgRghU5/sonny_bono_death_age.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nawevuf.epizy.com/html_form_checkbox_checked_javascript.pdfIn PDF document text
    • http://sopozonareje.epizy.com/zamodix.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_off0000d2b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B8 5460 bytes
SHA-256: 7471b71b9834b2d43edb7a8ae0c45d70397225e902792ba5546f02d32254a050
font_01_sfnt_off0000e568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE568 12060 bytes
SHA-256: b5b7554c761df1a5d00532ac73d96fb8ec01858ca0a645ca5785453d921c8219

Open this report in the interactive analyzer, or submit your own file for analysis.