Malicious PDF — malware analysis report

Static analysis result for SHA-256 75b01e37f13b0157…

MALICIOUS

PDF

77.7 KB Created: 2021-02-24 23:40:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d1190cfb7ff53c2dacd4f0a5bbf149a9 SHA-1: 859cd5e09ce3decc8ecb62c5deffa74fa6b1801b SHA-256: 75b01e37f13b0157f5020a3c9c31f11ab32f45492a225143c368f37e0cb62a27
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://crophysi.ru/123?utm_term=washington+state+covid+numbers%25EF%25BF%25BC In PDF document text
    • http://yourlivehelp.com/geophysical_research_letters_templatef8mx3.pdfIn PDF document text
    • http://libertinemodels.com/jakalixejil5874.pdfIn PDF document text
    • http://itclick.pro/pudufujegijoxumilug8lqa.pdfIn PDF document text
    • http://apple-fruit.space/33150542968fqa17.pdfIn PDF document text
    • http://hd-cam-mirror-up1.club/796145123637s5z8.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/52977661851.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446045/normal_5ffc6e07939a7.pdfIn PDF document text
    • http://cocobuka3.xyz/42803257603rcmk8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490366/normal_5fccf431455b7.pdfIn PDF document text
    • http://mantenancie.com/why_is_my_new_glock_jamming3x0ol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388626/normal_5ffb42e0140ec.pdfIn PDF document text
    • http://my-favshopd.online/gunslinger_matt_mercer02yuy.pdfIn PDF document text
    • http://frontglass.xyz/runudidetuwuwofeh8h5k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470205/normal_6014d9a989a39.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sutexuvidag.myartsonline.com/banosakuviporuvosujupat.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_off0000f256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF256 5540 bytes
SHA-256: e4360b74f82589f05fca9a5012934c50e31d2bcedc0f8a3ad81b87dee84be7a5
font_01_sfnt_off00010518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10518 10260 bytes
SHA-256: 5918640145d52a36fd88ad1c27d19e3d27661a00eaaea7031a435c4cebccf389