Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8d65e00f7b72f77…

MALICIOUS

PDF

87.3 KB Created: 2021-03-02 11:42:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b9812e0f153efe7e34a77307d0b7eef8 SHA-1: 4901dd3fc4daa1ec82e9f9916ab9d028c47afa57 SHA-256: b8d65e00f7b72f773541f0ceb7f83a427e2e3870aa94343fa4a786c97b0a3ef0
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically indicating phishing and trojan activity. It contains a large number of embedded URLs, many pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, appears to contain metadata related to PDF generation and potentially misleading content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/strik?utm_term=mr+coffee+steam+espresso+machine+manual PDF link annotation
    • http://technodom11.com/5441484274898yqq.pdfIn PDF document text
    • http://ukranews.icu/zutovekupajofagijixernqf0.pdfIn PDF document text
    • http://tarenutufitox.66ghz.com/does_costco_have_sodastream_refills.pdfIn PDF document text
    • https://cdn.sqhk.co/jagojixego/gjihfUh/wewugisu.pdfIn PDF document text
    • http://genoray.pro/zowoxokibu5yy0l.pdfIn PDF document text
    • http://hargotel.xyz/how_to_insert_page_break_in_excel_on_mac7wyzh.pdfIn PDF document text
    • http://avbox.org/92610848263n6o3x.pdfIn PDF document text
    • http://rm-swis-mine.com/bruce_lee_video_freebw3y1.pdfIn PDF document text
    • https://cdn.sqhk.co/vivakawibaki/bBgjiaz/42757599697.pdfIn PDF document text
    • http://fakurivevid.scienceontheweb.net/95876060340.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://piludid.epizy.com/lekaxuseju.pdfIn PDF document text
    • http://zorikeroz.onlinewebshop.net/who_are_the_norse_vikings.pdfIn PDF document text
    • http://wawebexitet.rf.gd/james_allen_pricescope_discount.pdfIn PDF document text
    • http://dozuxix.myartsonline.com/washing_machine_door_lock_light_flashing.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/74591382689.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD6 5260 bytes
SHA-256: c193d4783268d8df6b1b3fda37570e4e726f006eaf1a402173506314f4d53abf
font_01_sfnt_off00011e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E99 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_02_sfnt_off000129fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129FB 10988 bytes
SHA-256: aad9d1c47db595070d71f6dbe7d7893dd9f2d8cc7787cacd97da96c183ee96b8

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