Malicious PDF — malware analysis report

Static analysis result for SHA-256 04821ad209e6ed0c…

MALICIOUS

PDF

87.4 KB Created: 2021-01-30 17:47:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8f38c9f22cd34d9033dfe6916a447fa3 SHA-1: 804042f73df86b8881e369f17cdb8718e3dc2f72 SHA-256: 04821ad209e6ed0cbc51caf65821942d0c21f1a90b1311baa35d28b2e25c7a59
124 Risk Score

Malware Insights

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

The PDF contains multiple embedded links pointing to known malicious redirectors and disposable hosting, indicating an attempt to direct users to harmful sites. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of numerous suspicious URLs suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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/123?utm_term=gymshark+shorts+review In PDF document text
    • http://domainlimax.xyz/23254692002mjsa3.pdfIn PDF document text
    • http://sikagez.22web.org/best_travel_guide_books_for_new_zealand.pdfIn PDF document text
    • http://ninozefumuwu.iblogger.org/37074591055.pdfIn PDF document text
    • http://fepafotejidug.iblogger.org/volitional_form_negative_japanese.pdfIn PDF document text
    • http://cz-nitrof.website/143533291929g8al.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388157/normal_5ff2c0d0c4b97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427526/normal_6014d7ee08f37.pdfIn PDF document text
    • http://registrat.space/schema_electrique_va_et_vient_avec_voyant_lumineuxqwk6q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414873/normal_5ff06de359270.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/jfcVidG/38541008754.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/lososimap/kaduxelunaluzudiwagedib.pdfIn PDF document text
    • http://gilebufamefaf.rf.gd/leguwemubisogisaro.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/jibupaj.pdfIn PDF document text
    • http://girifej.epizy.com/key_account_manager_job_description.pdfIn PDF document text
    • http://vilusosexar.epizy.com/kijifosazizonabilila.pdfIn PDF document text
    • http://fegidil.rf.gd/ahpra_advertising_guidelines_chiropractic.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/canon_printer_driver_g3000.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA71 5240 bytes
SHA-256: 88b6510b980247bb1bd99bc885ebfa6a8ce235b3017fa763a014b446eb3bf497
font_01_sfnt_off00010c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2B 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off000114b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B9 10992 bytes
SHA-256: 3f7fb79f0914be95bce02a3dfb2fa1732c237971bd459943c46516837f004a96
font_03_sfnt_off00013a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A82 16168 bytes
SHA-256: e5458d7b6d82539349b17fc4713a17e1381d471255c72d9f8116b7c86e08c443

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