Malicious PDF — malware analysis report

Static analysis result for SHA-256 38a864cab3e770ca…

MALICIOUS

PDF

73.8 KB Created: 2021-02-18 13:33:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a0c4c839b669b63b5529847007172b34 SHA-1: bbef5b7b4e81e9f4064fa34a4aea87434866e78d SHA-256: 38a864cab3e770ca4b51ca3f4997a7e25be9413896504eafd4084773a792fa3a
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jacksth.ru/aws?utm_term=stihl+bg+86+c+leaf+blower PDF link annotation
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/muzanox.pdfIn PDF document text
    • https://pinoxelu.weebly.com/uploads/1/3/4/1/134108818/8f48db3f4037.pdfIn PDF document text
    • https://pewituzusab.weebly.com/uploads/1/3/0/8/130874049/8040224.pdfIn PDF document text
    • https://zebomutob.weebly.com/uploads/1/3/2/6/132696512/50ebd94.pdfIn PDF document text
    • http://blankid.ru/birthday_gif_free_for_whatsapp45e01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489058/normal_5fec7016cb8eb.pdfIn PDF document text
    • https://vobilazi.weebly.com/uploads/1/3/5/3/135300702/5598867.pdfIn PDF document text
    • http://terem.space/pixel_art_candy_color_by_number_onlinedf6m4.pdfIn PDF document text
    • http://summ-green.fun/free_new_york_real_estate_salespersoj9c4p.pdfIn PDF document text
    • https://doxuvufunufake.weebly.com/uploads/1/3/0/8/130874670/pemosevibifamazemije.pdfIn PDF document text
    • http://migerov.xyz/806600741251xg99.pdfIn PDF document text
    • https://mizavujubamu.weebly.com/uploads/1/3/0/7/130775062/jazogokezapukuvebe.pdfIn PDF document text
    • https://genezekanoz.weebly.com/uploads/1/3/1/4/131413678/fokalis.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/muvemasoxaji/72942466979.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/27540427092.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/vba_excel_tutorial_for_dummies.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/alludu_seenu_film_sinhala_subtitle.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/biology_practical_notes_for_class_12.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_off0000e21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21C 5648 bytes
SHA-256: 001c51907c94e970af5192d97e43b13d91ac6bb23387224f1a2d51b30f0ff29d
font_01_sfnt_off0000f56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56C 10756 bytes
SHA-256: 3e0e5f7d380c94393a766d0b0f697985d2849c5d3fefa720fd341b57f68b6db3