Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c30dea1e54ba618…

MALICIOUS

PDF

73.4 KB Created: 2021-03-04 11:19:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: bcc4444c755c47689b8d286d4075daa3 SHA-1: 4e5785c8580a8f2e637b02da22900fd3550115b7 SHA-256: 4c30dea1e54ba618e5a42f6d415c9483faee425d53be5e4b52967b5902df9efe
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://kuzutuzo.ru/wix?keyword=the+good+samaritan+book+by+rene+saldana+jr PDF link annotation
    • http://nakalabaxis.mywebcommunity.org/kenenona.pdfIn PDF document text
    • http://laulu-go.ru/our_new_life_together_quotesghmmi.pdfIn PDF document text
    • http://steblin.pro/270357506928jndh.pdfIn PDF document text
    • https://cdn.sqhk.co/riwifesineji/hiifgc8/spiral_falling_ball_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/lesepivir/QjdihfU/54829120523.pdfIn PDF document text
    • http://save50it.pro/photoshop_cs3_learning_bookvon9h.pdfIn PDF document text
    • https://ralerafuzirepob.weebly.com/uploads/1/3/4/3/134386916/bokajod.pdfIn PDF document text
    • https://cdn.sqhk.co/wesebewoweva/d3Cjfgc/my_avatar_maker_design_your_avatar_right_now.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390381/normal_5ff259bed3295.pdfIn PDF document text
    • http://salestore.pro/duvekub7wecz.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwesedujila/eBUjcji/bosch_laser_distance_meter_price_in_sri_lanka.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/kabisebax/mortgage_gift_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/rugifatubewopirolagagarap.pdfIn PDF document text
    • http://keregimuw.onlinewebshop.net/samsung_refrigerator_rf4287hars_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/book_of_enoch_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/veronesulosawakado.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/70641871109.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/seo_search_engine_optimization_bible.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_off0000e1f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F8 5572 bytes
SHA-256: b180eae5594407345f6aeffac973892bfb39715773688050a7946f0d3e6d489f
font_01_sfnt_off0000f4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C9 9844 bytes
SHA-256: aa1304e7194df63cc354493a03bbe72940f22949d8f6e1f11bccbd7f96586453

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