Malicious PDF — malware analysis report

Static analysis result for SHA-256 306dd95614dea6f5…

MALICIOUS

PDF

74.6 KB Created: 2021-01-10 04:11:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bd3e010982aa4edeff06beecb0682e93 SHA-1: 5d8eeabfcbe69d123d5e98b335a4cccb11d0b85e SHA-256: 306dd95614dea6f511ba2dfd1499cbcd54492990cc1f86367efb47f94507eb63
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://trafffe.ru/aws?utm_term=checkpoint+ccsa+training+pdf PDF link annotation
    • https://mafenipo.weebly.com/uploads/1/3/4/8/134879688/tuxufi.pdfIn PDF document text
    • https://site-1180269.mozfiles.com/files/1180269/18221813922.pdfIn PDF document text
    • https://site-1174611.mozfiles.com/files/1174611/hexagonal_prism_volume.pdfIn PDF document text
    • https://vonegulozezuxe.weebly.com/uploads/1/3/4/3/134371031/fumos.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/gatazeromij/36058102671.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/39445793196.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/1306340569.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/juduzaleruxeremikiwuveje.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/jenoverejilexevafepoz.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/avast_antivirus_offline_installer_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/51973068935.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/bloons_td_5_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/nakolukarekefevudeno.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/bootloader_samsung_j1.pdfIn PDF document text
    • https://s3.amazonaws.com/nepawigexa/77357011054.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_off0000e545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE545 5352 bytes
SHA-256: 18f97b43186729a0644fb02a574743ef6267b3884b325ca3e8d5dfb0f61596d4
font_01_sfnt_off0000f772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF772 10836 bytes
SHA-256: 2f34d30dfce5aedb439f012a5975f952bf63c1bdc59dfc48b889f640910681f2