Malicious PDF — malware analysis report

Static analysis result for SHA-256 a634d3e1001bbbe3…

MALICIOUS

PDF

72.4 KB Created: 2021-02-18 22:36:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 329b8888e3153bbb4a1b243973fb7419 SHA-1: a750ce5c52e784a6bab6b5fec9a6e9079d4039d4 SHA-256: a634d3e1001bbbe39dd114bb1fabafec59545d409eda8b7a63b8bcd118ac9fb4
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jacksth.ru/aws?utm_term=enemy+pie+book+review PDF link annotation
    • https://zinorenote.weebly.com/uploads/1/3/5/3/135349773/46d66fafbeace1e.pdfIn PDF document text
    • https://sagopitura.weebly.com/uploads/1/3/1/1/131164573/6d4c0.pdfIn PDF document text
    • https://rufekelikofevav.weebly.com/uploads/1/3/1/0/131070689/7336223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412996/normal_6013a2914108d.pdfIn PDF document text
    • https://vipegiwofavagob.weebly.com/uploads/1/3/5/3/135302795/7153185.pdfIn PDF document text
    • https://xinofebew.weebly.com/uploads/1/3/5/3/135305957/3920085.pdfIn PDF document text
    • https://cdn.sqhk.co/rufopunuk/dIjdi1v/tewajubutibipuso.pdfIn PDF document text
    • https://ninujesifig.weebly.com/uploads/1/3/1/4/131453022/051a121.pdfIn PDF document text
    • https://lulodepi.weebly.com/uploads/1/3/0/7/130776712/zulodijijuz_funonurasu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450336/normal_6026ee2d2558b.pdfIn PDF document text
    • http://wrinklestiltskin.com/le_gentil_petit_diablekh6eu.pdfIn PDF document text
    • http://899themes-demo.ru/candle_chart_analysis4i46a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481158/normal_5ffbc240a0995.pdfIn PDF document text
    • https://kupifibadobibe.weebly.com/uploads/1/3/4/5/134512214/8c5ea47535.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://favirivesez.epizy.com/chhath_puja_song_full_hd_video.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_off0000dfee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEE 4960 bytes
SHA-256: a2634efd0d1657f42ebd4d3a43bb1524abffd30e1e83ba9a7950f60b9afe09d7
font_01_sfnt_off0000f0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D6 10652 bytes
SHA-256: 3058a2b6169041f7c33bbbbaec5266c54970ed12d920ee0af2dabc81bc20fdd2