Malicious PDF — malware analysis report

Static analysis result for SHA-256 023ff5eab0088bee…

MALICIOUS

PDF

75.4 KB Created: 2021-02-16 19:08:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 83d5d160ec4934bcef23526bd36d87d2 SHA-1: 9fe1064527dd7a3f602db1abf5af20b53d11b48d SHA-256: 023ff5eab0088beebe21d724743cc9e6eea10b0d7eedbace573eeb9bfb2e8f27
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/123?utm_term=leaf+footed+bug+spray PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423471/normal_6025b2653ec02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502268/normal_5fd8e86ce2bc2.pdfIn PDF document text
    • https://fewanisip.weebly.com/uploads/1/3/2/7/132712603/sifax_natox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482207/normal_602a0a1fdc27c.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxeromewime/Dbgijd7/gakuv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451352/normal_5ffb6e6ecf4aa.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuligote/Iia9ie6/nopoxadigibajapatizuk.pdfIn PDF document text
    • https://goxatuzibifonev.weebly.com/uploads/1/3/0/7/130739188/giwirizidux-pikenuro-kigesovulari-tosuze.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/zamuriza/87913338545.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/speaking_part_3.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/69549303724.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/16876584072.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/banati_hai_jo_tu_status.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/49342075815.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/order_of_operations_worksheets_with_no_exponents.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/digital_clock_worksheets_grade_2.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/hv_800_bluetooth_headphones_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/modle_attestation_de_stage_formation_professionnelle.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_off0000eb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB78 5360 bytes
SHA-256: 358c91d5fd69ff8c19c489a62e710bbee8bc62bf3723915dace2db1b81529510
font_01_sfnt_off0000fdcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCF 10224 bytes
SHA-256: 613ecb7c0fc44d5185a884030772adffdebf743f569e1d3bf0228b739699cf94