Malicious PDF — malware analysis report

Static analysis result for SHA-256 7482d73cbb7b3a7c…

MALICIOUS

PDF

68.0 KB Created: 2021-02-11 12:58:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 3ef0ba407715f2a718e06c1a680fa76d SHA-1: 12c20a1e7231f9c34a668720b601ec0a1e6314a4 SHA-256: 7482d73cbb7b3a7c86bf9f19618f44638351dcccc1d06c217cd68d656398c198
184 Risk Score

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
  • 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://crophysi.ru/wb?keyword=new%20asthma%20guidelines%202019 In PDF document text
    • https://nitomono.weebly.com/uploads/1/3/1/4/131454496/8249119.pdfIn PDF document text
    • http://muwazowezijowa.22web.org/arunachalam_tamil_movie_songs_masstamilan.pdfIn PDF document text
    • https://kagebavewijove.weebly.com/uploads/1/3/0/7/130740568/c7a64e7c9f.pdfIn PDF document text
    • https://xuwovovap.weebly.com/uploads/1/3/1/6/131607152/lurozovu.pdfIn PDF document text
    • https://mixenabunagoxo.weebly.com/uploads/1/3/5/3/135320093/2868036.pdfIn PDF document text
    • https://nabaladeso.weebly.com/uploads/1/3/1/4/131438379/nanizefujugemivufu.pdfIn PDF document text
    • https://sajofagexureleb.weebly.com/uploads/1/3/4/6/134652103/8989068.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/fosawef/78588097718.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/vabenexuvikuduraki.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/72577511417.pdfIn PDF document text
    • http://nafinuxunowu.rf.gd/susifadopajokosofuzosuje.pdfIn PDF document text
    • http://nibedob.rf.gd/accounting_information_system_ppt_james_hall.pdfIn PDF document text
    • http://rupojizob.epizy.com/duke_of_edinburgh_expedition_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/vofakobineralekunubafupo.pdfIn PDF document text
    • http://leguliwopubagu.epizy.com/winomolemudofemezariz.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_off0000cd77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD77 5688 bytes
SHA-256: 57263faec6fefde6ed4c9f589b337e2552ef276c1b57161b246ce4aae62f2005
font_01_sfnt_off0000e0cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CB 10184 bytes
SHA-256: 594a285be5b2c4cf2cd9e38f1622b1c9c94eb4c56b92d908aa2defebee8c6a98