Malicious PDF — malware analysis report

Static analysis result for SHA-256 d497333da48274eb…

MALICIOUS

PDF

62.8 KB Created: 2020-11-30 00:13:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: cb400f894d1cec1b09c9b6b57c094529 SHA-1: 144b9d70220ecc9fb9c4b62c05a621013cafc8ff SHA-256: d497333da48274eb9120fdb72377c44d02dd87988fb251a789f8e59d3bc529c2
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/square?utm_term=google+nautical+charts In PDF document text
    • https://mawepalutolura.weebly.com/uploads/1/3/4/0/134040672/nigizadaxajunagafam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375194/normal_5fc012d0a42b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5f950fdc0385c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413238/normal_5fc0811a337d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371505/normal_5f9980a8d09c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376619/normal_5fc2ccd5b7ce4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403417/normal_5faf5eb883968.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374968/normal_5f9afaaf1a934.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418993/normal_5f99cd1358fba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389804/normal_5f956deef0a8c.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/tetazino/66520308588.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/back-_ups_ns_600_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/pakagafiwifolipo.pdfIn PDF document text
    • https://s3.amazonaws.com/damevusom/i_shall_not_die_but_live_and_declare_the_works_of_the_lord_song_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/choix_de_l_appareillage_lectrique.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_off0000b93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB93E 5092 bytes
SHA-256: 1e7f5edeeafb6f7856dfbec54d9772caa18062c7069c05d6ed96c53843da9049
font_01_sfnt_off0000ca8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8A 10672 bytes
SHA-256: a4d9d4ce351cd6170660df6fa28997a4bd0fa9eb03e9c79954aaf67584ae8b9f