Malicious PDF — malware analysis report

Static analysis result for SHA-256 b66d24b342f25605…

MALICIOUS

PDF

63.0 KB Created: 2020-12-26 21:57:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 672b6532547b93dc6a16269e6796df17 SHA-1: 2538050a34765eaca23a0409716cafec4de25585 SHA-256: b66d24b342f2560572fa5d7f28d3482279a0b2d544a5aead585436592a11dcf0
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/aws?utm_term=delta+h+worksheet PDF link annotation
    • https://cdn.sqhk.co/gibuzini/jbdAFha/neon_live_wallpaper_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376619/normal_5f9207f7770c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390381/normal_5fd234687de90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464301/normal_5fbb5622d56f7.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/bogeguva/14325411279.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/26155921780.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/mitotic_inhibition.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/15021892221.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/57876851124.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/duke_energy_progress_power_outage_report.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/android_studio_shortcuts_settings.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/gigantiform_cementoma_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/27800648260.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/thanksgiving_scrambled_words_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/nikoniwakipizuzedo.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_off0000b83a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB83A 4928 bytes
SHA-256: 3f3b2faf12052cc342d7042a6a5753a3b367798c975bde1564ba428d4c7020dc
font_01_sfnt_off0000c90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC90B 10960 bytes
SHA-256: 149c36b7ea42cab8644157bb4fdc47756432454f4719b4b4aeb349e682800689