Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d423c1df1cd84c…

MALICIOUS

PDF

70.1 KB Created: 2021-01-28 01:03:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: f5a9e2cbbbfdc987a1d73c32c97716ad SHA-1: e6096fa3d1835141df9a84a63963c69b606221a6 SHA-256: 47d423c1df1cd84cdd23a1ba51e59d06853844cb93d6241540959b17274b192d
196 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
  • 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/123?utm_term=295%252F55r20+all+terrain PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369161/normal_600c05be325e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458132/normal_6006d11290641.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384650/normal_5fd05ff17af0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373782/normal_5ff3544aaf8ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414489/normal_600764e96f0ef.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/Xigjhig/pixel_z_gunner_3d.pdfIn PDF document text
    • https://bukudemedu.weebly.com/uploads/1/3/1/4/131483547/430e174b8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477409/normal_5fced402e5ed8.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/zifilobesumafi/tividavakuvofuwadurige.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/kivepajol.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/baahubali_1_telugu_movie_movierulz.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/letupavamux.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/fumuvitu.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/72221469569.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/mental_health_clinical_practice_guidelines.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_off0000d550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD550 4996 bytes
SHA-256: 92893a92e80ca6b1442655b40a5322d9f42d5719ce70b554aa4dea7128a29449
font_01_sfnt_off0000e65f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65F 10904 bytes
SHA-256: 488f854d7ce08a9860b09707e15ad988fd84fc83000168db972f216345c1589e