Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d13f693b5a516d2…

MALICIOUS

PDF

46.4 KB Created: 2020-11-06 01:17:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: c41e67f0e3ea82dfd885adc37b5408af SHA-1: 85915e9db1f4bcaf9794919d2e6dda1d3834fa7a SHA-256: 3d13f693b5a516d241be8d51e587bbe9cea7677b1247f4a07aa08e7924903613
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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/123?keyword=i+ll+give+you+the+sun+book+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379048/normal_5f8af47fb6084.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/2122744.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/6f8e0550147c.pdfIn PDF document text
    • https://milavigik.weebly.com/uploads/1/3/2/8/132815866/9164513.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/8594117.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/jifesu/61403876071.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/7457512380.pdfIn PDF document text
    • https://s3.amazonaws.com/nozazodivin/memoxonixired.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/surajutufifipisebak.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/wapuju.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/pdf_to_word_converter_app_free_download.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A9B 5300 bytes
SHA-256: 0d69af204c2ef19986780c3648e876103cab72bb353ae3b8803c022f90b417d4
font_01_sfnt_off00006cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB2 11004 bytes
SHA-256: ba819eb37651d631e536920a062df2fcc142c4896851f6e8184b7f2af25fc1e9
font_02_sfnt_off0000922e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x922E 17288 bytes
SHA-256: 646269276e854e20c3c6bda461a7e8e9de1c16dc91d4b6ebdc69410a33725385