Malicious PDF — malware analysis report

Static analysis result for SHA-256 49c393653184ee90…

MALICIOUS

PDF

73.0 KB Created: 2021-02-13 07:49:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: bb75a4c111f1388f53f3e587e92ff6df SHA-1: f26aa4388d7d64c7d5d42daa4597b72dba7328c1 SHA-256: 49c393653184ee90319e6cf2f7937c42fc9ce181adfaea81f41385f023a47e2c
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://druttle.ru/wix?keyword=chemical+reaction+quiz+answer+key PDF link annotation
    • https://cdn.sqhk.co/melipetoluf/eSvxjcH/lowe_s_hours_today_july_4th.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417314/normal_5fcd3a3c858c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455884/normal_6008dbfce2b6b.pdfIn PDF document text
    • https://cdn.sqhk.co/xugumewaz/f4mjhih/fun_literacy_activities_for_year_6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380691/normal_5fe1c8cf303b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420431/normal_600528cedb9b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527164/normal_5fca906a92d98.pdfIn PDF document text
    • https://cdn.sqhk.co/kutisetu/j8ja1Ua/teveduz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495400/normal_601af46b12622.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530070/normal_6014177b95a44.pdfIn PDF document text
    • https://cdn.sqhk.co/rewazexi/BibF0ij/enemy_strike_mod_apk_unlimited_gold.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411228/normal_600dbd30a6e52.pdfIn PDF document text
    • https://cdn.sqhk.co/leluforeref/ghqKjbf/82849733836.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443588/normal_5fe003d1b1d73.pdfIn PDF document text
    • http://labiosdewonda.com/introduccin_al_anlisis_de_circuitos_boylestad_10_ed41x6d.pdfIn PDF document text
    • https://cdn.sqhk.co/gokarunedod/WQRhgjl/komevepaju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ca12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA12 5376 bytes
SHA-256: 6ff303d0b57b7234c12b1a8ba91977a398b79620dcde9ab6548a032216df76a0
font_01_sfnt_off0000dc4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4A 11168 bytes
SHA-256: f6691c9c3061f41bf6fefb5674eb5d6ae7e2775b351731b2a8582d9498002f4e
font_02_sfnt_off000101b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B6 16144 bytes
SHA-256: 18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b