Malicious PDF — malware analysis report

Static analysis result for SHA-256 c41f57157f884d27…

MALICIOUS

PDF

74.8 KB Created: 2021-02-21 01:56:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: bf778135a2596d65df3445626caf0472 SHA-1: 3d11dd1a532db8612e9f4503aa98a6ea1fdab6c7 SHA-256: c41f57157f884d27c8090d6657a6f5226ce31fc0848be148927bd921608fd5aa
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wb?keyword=is%20there%20fifty%20shades%20of%20grey%20on%20netflix In PDF document text
    • https://cdn.sqhk.co/debefuki/cl1ghhb/mifedaxefajixobavu.pdfIn PDF document text
    • https://rokozozo.weebly.com/uploads/1/3/4/4/134498035/losevadiloded.pdfIn PDF document text
    • http://originalhallyu.com/rafumefatasoxizavazclz17.pdfIn PDF document text
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/ee5c05e0e26fc.pdfIn PDF document text
    • https://popagupo.weebly.com/uploads/1/3/1/4/131407300/7808549.pdfIn PDF document text
    • https://xisuludibu.weebly.com/uploads/1/3/5/3/135300694/minixa-jipoguvibiwiv-natiwumigezuf.pdfIn PDF document text
    • http://1pokypki.website/cordless_phone_dect_6.0_reviewswboax.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/ijmZjd1/2140393956.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebosatu/NOxidux/star_wars_kotor_2_restored_content_mod_steam.pdfIn PDF document text
    • http://tur8osale.site/youtube_mp4_dizi_indird4g06.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pazatirademe.rf.gd/68321137064.pdfIn PDF document text
    • http://kisitibonadal.rf.gd/define_canonical_form_in_digital_electronics.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/alldata_labor_guide.pdfIn PDF document text
    • http://vejobewibibir.epizy.com/attitude_magazine_august_2019.pdfIn PDF document text
    • http://mokunir.rf.gd/42950345816.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_off0000e6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B3 5276 bytes
SHA-256: 1bd138ad97570f98a8b3fdb929237ccbdd4e3fd077dc12011e6e1674856f92b0
font_01_sfnt_off0000f8af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AF 11040 bytes
SHA-256: 56d76b071be55af04f8de8d5898164391d6ba8773baf5635e8cd9eb20d342d11