Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b59fea7062e56e8…

MALICIOUS

PDF

73.5 KB Created: 2021-02-21 00:13:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d8bb88be0690cfffa20a6da4e888ef35 SHA-1: 3a175a70aee6b12f97848c703e8ba55a0e45bcb9 SHA-256: 0b59fea7062e56e8d69bcc1e867b834f9302599f49963e3e028a29b93693c199
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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://bologen.ru/strik?utm_term=how+to+write+about+soccer PDF link annotation
    • https://cdn.sqhk.co/rowazazapa/gfhaQYI/the_bucket_list_family_home_renovation.pdfIn PDF document text
    • http://tublitalia.fun/amzn_next_earnings_report_datefrg4m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503584/normal_5fe987bbc89bf.pdfIn PDF document text
    • https://cdn.sqhk.co/wezopexa/hae7Tih/ikea_bed_sheets_australia.pdfIn PDF document text
    • https://mewuvirinikupu.weebly.com/uploads/1/3/4/5/134505229/wokumed.pdfIn PDF document text
    • http://erkutungotu.com/telugu_new_movies_2019_tamilrockersbmr4y.pdfIn PDF document text
    • https://cdn.sqhk.co/jugemito/gdhgJhj/lubojolodo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468819/normal_5fee6d479b9fc.pdfIn PDF document text
    • http://reestr.site/zaman_logam_di_dunia8g4ag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448991/normal_5fea24a8485e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448347/normal_6012b1a88ad58.pdfIn PDF document text
    • http://vorecan.space/46871964661gh1oo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410441/normal_5fddf733948db.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mewozukejos.rf.gd/elantra_2018_brochure.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_off0000e5d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D0 4956 bytes
SHA-256: 412852a15bb50ed9306969f642be35c2a34cb57332f5a4de25a1eba96baa7aef
font_01_sfnt_off0000f6c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C5 10092 bytes
SHA-256: 4caecd08b2ee9ddfd34aac108f4f1accfa843bb1f955337f727b8c628533d903

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