Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbfb39acc185acc6…

MALICIOUS

PDF

70.2 KB Created: 2021-02-07 10:02:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f90657ebd82591300a55070d52c1aa3d SHA-1: 0da248b40a25a213741008607ff122ef3a74c304 SHA-256: cbfb39acc185acc691abae1a3fb813b44fe699236faedebf6a38519e6ea86d36
184 Risk Score

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
  • 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/aws?utm_term=linear+guide+roller+bearing+sliding+rail In PDF document text
    • http://biomanua.website/wonder_woman_bloodlines_freeob0oo.pdfIn PDF document text
    • http://faromobipon.22web.org/geotechnical_report_sample.pdfIn PDF document text
    • https://mefevujeloz.weebly.com/uploads/1/3/4/3/134317202/8189571.pdfIn PDF document text
    • https://rojurunonujimos.weebly.com/uploads/1/3/5/3/135325454/a97841f.pdfIn PDF document text
    • https://vesabigixovo.weebly.com/uploads/1/3/1/8/131857304/6130711.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408002/normal_5ff365cd24acc.pdfIn PDF document text
    • https://faxojoduso.weebly.com/uploads/1/3/5/3/135351685/2279444.pdfIn PDF document text
    • https://nariwezug.weebly.com/uploads/1/3/1/4/131482968/179189305edd45.pdfIn PDF document text
    • https://kazimiposaduvab.weebly.com/uploads/1/3/1/1/131163956/vuwitukuji.pdfIn PDF document text
    • http://puloxev.iblogger.org/81314162121.pdfIn PDF document text
    • https://bujivopipagafo.weebly.com/uploads/1/3/5/3/135321681/1335094.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://toduwez.epizy.com/aluminium_roofing_sheet_manufacturers_in_china.pdfIn PDF document text
    • http://xitirinajeki.epizy.com/66527060745.pdfIn PDF document text
    • http://muxajetolalet.epizy.com/zelirexajigazigeno.pdfIn PDF document text
    • http://xijovapafibowuw.rf.gd/benzocaine_spray_davis.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_off0000d5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EE 5072 bytes
SHA-256: 94fb8e0229ceedd39baaf22740291f672f40ebe0210025b591f5cc953af25f13
font_01_sfnt_off0000e73c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73C 10696 bytes
SHA-256: bd90ebdb85d228256920b5a7f343a152fcbce46d49841db68708d777e70ca90b