Malicious PDF — malware analysis report

Static analysis result for SHA-256 bec8dc6fd31f3530…

MALICIOUS

PDF

65.6 KB Created: 2020-11-11 07:03:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0c7e70973fa67e9831e62d1ca64b03b3 SHA-1: cb0f7c870819ed81fa3c9a078c040c09538e6c38 SHA-256: bec8dc6fd31f3530c0fcb4d1492798f715ef666ad7c95ddc625af5ed941bd0ba
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://traffset.ru/123?keyword=transpiration+vs+respiration PDF link annotation
    • https://xitupiwe.weebly.com/uploads/1/3/4/4/134489196/dd2d3eff5.pdfIn PDF document text
    • https://bogezozoxo.weebly.com/uploads/1/3/4/4/134479702/ralunukoxovovura.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/nobidejaguwivawo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9415272-ebb5-497f-89b9-2f1c8fc516e1/49552516091.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/aikido_my_spiritual_journey.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/64377548317.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/add_bookmark_to_adobe_reader_dc.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/legigas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/679c0a0f-f7bd-443e-bfa1-fd78020b267e/60325490135.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/wesiri.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/ucla_dental_school_preceptorship_program.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/diversity_essay_examples_medical_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0718f9dc-7b8f-49f0-996e-97387b920fb5/21890517591.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_off0000c5f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F0 4788 bytes
SHA-256: ef3e6a0a5346d6c74e215ac08b08f068b4bbf154f173f37aeece8d2c5aab144b
font_01_sfnt_off0000d64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64C 10404 bytes
SHA-256: f72d09629eae4e66a4ad4b3b1202c77a68d347281c17876b6407c788b3b9769f