Malicious PDF — malware analysis report

Static analysis result for SHA-256 4df856cb9d5a1018…

MALICIOUS

PDF

67.1 KB Created: 2021-02-18 15:47:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 04347cd218a7efc0438ce4e7f83e1f00 SHA-1: 06b982701e4d991ac3e2fff16204b44d6b264e37 SHA-256: 4df856cb9d5a1018eabb91fbbd048f3a6a71bf82d34a48f0334ac941264ac619
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/wix?keyword=jeep+xj+neutral+safety+switch+manual+transmission In PDF document text
    • https://static.s123-cdn-static.com/uploads/4481420/normal_60052c16d1007.pdfIn PDF document text
    • http://stebsmeh.space/fipuxoxoke3488o.pdfIn PDF document text
    • http://aycotoro0.xyz/ejercicios_comparativos_y_superlativ62u0p.pdfIn PDF document text
    • http://topchambre.xyz/anyway_you_can_annette_bosworthaaf13.pdfIn PDF document text
    • http://cybety.xyz/69665181857vov26.pdfIn PDF document text
    • http://graatorama.space/bokusoropumirukaxopeely.pdfIn PDF document text
    • http://winfreeiphone.xyz/gizizegerusalitiwije.pdfIn PDF document text
    • http://instapodarok.site/autocad_2013_64_bit_highly_compressen5htw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485440/normal_5feb82b588b37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422909/normal_60265b3649dc7.pdfIn PDF document text
    • http://shoop-fe.ru/butabozolonajeo7db.pdfIn PDF document text
    • http://ipoteka.net/fortigate_100d_configuration_guidezclrt.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/vajefam/gndu_date_sheet_ba_3rd_sem_2019.pdfIn PDF document text
    • http://jojerigexorow.epizy.com/what_does_it_mean_when_my_vape_pen_is_blinking.pdfIn PDF document text
    • http://pewubep.rf.gd/evaluating_logarithms_color_worksheet.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_off0000c684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC684 5580 bytes
SHA-256: 5c0239b4ac023133ed890791e8f5e74b2ea80528ee195a699673caca34ae3565
font_01_sfnt_off0000d97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97D 10524 bytes
SHA-256: ca0eb5fa35a87f8c70222d1dd156ab4ef724f6f0bcb19a63aa30ec7ef26aa52a