Malicious PDF — malware analysis report

Static analysis result for SHA-256 188c3f5d609d8053…

MALICIOUS

PDF

67.8 KB Created: 2021-02-05 04:00:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d06aa9c75b9462576bfed19c93085248 SHA-1: cff01520b110878373a86cd8cf32a4d2816be88d SHA-256: 188c3f5d609d8053f267f468b82380909e6836f3ce7abe69f6ab64b6b2ea84ba
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://bologen.ru/wb?keyword=muscular%20system%20diagram%20worksheet%20answers PDF link annotation
    • https://tipidaxu.weebly.com/uploads/1/3/0/7/130739537/ranareruwoxewidofiso.pdfIn PDF document text
    • https://lukibufipijuzom.weebly.com/uploads/1/3/3/9/133997252/b8cd3964300af0.pdfIn PDF document text
    • https://nukanepinax.weebly.com/uploads/1/3/1/4/131454046/6786072.pdfIn PDF document text
    • https://toredakiwireg.weebly.com/uploads/1/3/0/7/130739366/a13fa4ed778.pdfIn PDF document text
    • https://xijofufakeziti.weebly.com/uploads/1/3/1/3/131380729/wojepapef_wegosapud.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/jadere/7559641786.pdfIn PDF document text
    • http://vubixegigag.rf.gd/giroju.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/jazz_solo_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/havaianas_infant_size_guide_uk.pdfIn PDF document text
    • http://tuxavilewik.rf.gd/gmp_fda_guidelines.pdfIn PDF document text
    • http://zebigibozudival.epizy.com/56736807604.pdfIn PDF document text
    • http://pixuxurarosu.epizy.com/49197582021.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/31718849260.pdfIn PDF document text
    • http://baverasoge.epizy.com/free_machine_embroidery_fonts._pes_format.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/nevoxar.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_off0000cbb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB4 5616 bytes
SHA-256: ee33af983af57712bd257b801544b25370030f41bee15f7c92dba733e0209cb7
font_01_sfnt_off0000dec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC6 10384 bytes
SHA-256: a48259304c783ca5e88457e6700c191d6999dfd5e77db50565c05587c72164b4