Malicious PDF — malware analysis report

Static analysis result for SHA-256 2583fdafd28ca69e…

MALICIOUS

PDF

71.2 KB Created: 2021-01-08 20:13:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e42d98b0e0a5208a9f7d9f730ddbe95d SHA-1: e544d50600d977ff1dfc3f7e18554f6793f23747 SHA-256: 2583fdafd28ca69e2c0acd99089456f44e408573a1411e6697e9c209d156fca0
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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 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.
  • 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://traffking.ru/wb?keyword=ringtone%20download%20music%20dhun In PDF document text
    • https://zinuwikisabarek.weebly.com/uploads/1/3/4/6/134679236/70ff5.pdfIn PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/760386.pdfIn PDF document text
    • https://xatuzagu.weebly.com/uploads/1/3/0/7/130738971/gipoxivimup_noroj.pdfIn PDF document text
    • https://lijupumo.weebly.com/uploads/1/3/4/4/134496400/6858553.pdfIn PDF document text
    • https://kilobabax.weebly.com/uploads/1/3/1/8/131856311/wefowufako.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/df27e973.pdfIn PDF document text
    • https://gosidobesek.weebly.com/uploads/1/3/4/0/134017516/4489470.pdfIn PDF document text
    • https://toposizijud.weebly.com/uploads/1/3/0/7/130776562/zaruzofekomod.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/nerugiraxura/goldlion_holdings_limited_annual_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea0bf91b-4009-458b-8978-523c108c7d0a/kekaxer.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/ibuprofen_nursing_considerations_davis.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/mirilu.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/dogeminer_2_hacked.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/7095739442.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b14d0dd5-178c-43ac-866d-474adf133606/48362438860.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_off0000daab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAB 5356 bytes
SHA-256: 32384672587d87372fdc22a8076e9c9b4288fb02a409c454245a4ed2a6848d58
font_01_sfnt_off0000ecdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDB 10348 bytes
SHA-256: e10b355f310186bfde35c659a3c5d8bae0f3465faa7e07213bf58d1e0b3510c4

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