Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca2add3d63fedb3d…

MALICIOUS

PDF

69.9 KB Created: 2021-02-14 15:37:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b8afb7cad9ef3d6fd3067390aed7f08c SHA-1: b5b119a2051759f8c6f611c6a794156cbbabc5f5 SHA-256: ca2add3d63fedb3db36404ca2d75da1aa9f5fbed84a275935414c01da69af7a9
244 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.
  • 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://crophysi.ru/wix?keyword=force+table+simulation In PDF document text
    • http://shtangennstutkupitseychas.xyz/tanusedelebusonuduicis1.pdfIn PDF document text
    • https://jokikisiva.weebly.com/uploads/1/3/0/8/130873994/fosejepivufu_fowineladezu_kabojetotepirez.pdfIn PDF document text
    • https://pibigetikuke.weebly.com/uploads/1/3/5/3/135387636/sejawavodolis.pdfIn PDF document text
    • http://svoylend.xyz/kifatamovutonnsr.pdfIn PDF document text
    • http://cheapkeys.site/libiamo_nei_lieti_calici_spartitorq28r.pdfIn PDF document text
    • http://ranking-se.com/8084247032862g9m.pdfIn PDF document text
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/gufudaru.pdfIn PDF document text
    • http://repochka.site/two_smoking_barrels_castkzgtf.pdfIn PDF document text
    • http://emmetrix.net/360806397810042x.pdfIn PDF document text
    • https://zipawigulugug.weebly.com/uploads/1/3/4/9/134902713/wofex.pdfIn PDF document text
    • https://kukefilatisila.weebly.com/uploads/1/3/4/4/134498126/perokepasomo.pdfIn PDF document text
    • http://donbetosstreettacos.com/mumebj73tz.pdfIn PDF document text
    • http://andyhong.blog/black_powder_reloading_manualt37wm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416151/normal_5fe22169eb85d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kubilev.epizy.com/metodo_naturale_contro_le_formiche.pdfIn PDF document text
    • http://jakunivejejaxo.rf.gd/39314207176.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_off0000d534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD534 5040 bytes
SHA-256: 2b7a097fe123f069e895fea1ffed9bb868f7b0bcf367b1962b6ce1bfdb1924f2
font_01_sfnt_off0000e63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63F 10832 bytes
SHA-256: 430cf28dbac3537af17f450025cb46565ca9fd9007730a8acedbb208d8dc2d90