Malicious PDF — malware analysis report

Static analysis result for SHA-256 163bf54b9a11f7c6…

MALICIOUS

PDF

68.4 KB Created: 2021-02-18 22:29:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 83c5ef5bf66466fc773cdb825313d7f2 SHA-1: e70be8d66d1e8bac6dc2c8b5be7dc1057c3f00ca SHA-256: 163bf54b9a11f7c6fdf844eb6734e5c3ac235718c34df1fbc08dca5cf27d3b06
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=computadoras+de+escritorio+best+buy In PDF document text
    • https://static.s123-cdn-static.com/uploads/4368237/normal_5fdc94fd2a9b8.pdfIn PDF document text
    • http://3gusevshop.website/94078339916wm2x0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419818/normal_600d642352c7b.pdfIn PDF document text
    • http://idealslim-ordina.site/freedom_of_religion_examplesg2h7v.pdfIn PDF document text
    • http://affilateapp.online/9779321800cw7ui.pdfIn PDF document text
    • http://detonic-de.website/heir_of_light_guide_2020oje7u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392864/normal_5fdcf04554477.pdfIn PDF document text
    • http://korecos.ru/cervical_rib_exerciseszlqlz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462974/normal_5feb9cc928c78.pdfIn PDF document text
    • http://reduslimitalia-official.site/composite_sketch_looks_like_reporteruvtih.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/lupuvogotog/2006_honda_odyssey_oil_pan_torque_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/gallery_html_template_w3schools.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/89639285532.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_off0000cdf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF6 5336 bytes
SHA-256: 01edccef6e8db7da0e77c5da0babcf1732106a69312cc2eceba6160b5c840067
font_01_sfnt_off0000dffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFC 11252 bytes
SHA-256: c1df4adce8b3f9748d4081651fce525e149b5cc4a14b69c2714eb1e970cc3c8b