Malicious PDF — malware analysis report

Static analysis result for SHA-256 de56cba4b8ba8f5e…

MALICIOUS

PDF

70.3 KB Created: 2021-03-05 14:11:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: bf8d21acc358a57a842db65fab4fc986 SHA-1: 5b69d570ad14165b7ba240fbe671d6ec53ae3a69 SHA-256: de56cba4b8ba8f5eeaeb8c0e84670ac82387795711a01fdc1aa29f01bb8138a9
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://seumenha.ru/award?keyword=sketchup+pro+2019+license+key+and+authorization+code PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387031/normal_602eac87f1ef0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404515/normal_600ce7af94a05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426832/normal_5fde1edb5cfe6.pdfIn PDF document text
    • http://imgfil.com/18fyv1In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://39c10a3a-92c6-412a-a1bb-b8a1fc48fbc4.filesusr.com/ugd/259099_1ad3fe5c463a474b8b677e5dbe2aebc8.pdf?index=trueIn PDF document text
    • https://23751d96-d7b3-42ca-b8ca-e459b671ea95.filesusr.com/ugd/7de994_9a30bfb949fe44388d5bfcfab7e24cd3.pdf?index=trueIn PDF document text
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_efa9445e99c945489c9ec426bc21d56e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juvetaso/bang_bang_hd_video_song_videoming.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/first_certificate_in_english_cambridge_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/the_hobbit_1_dual_audio_720p_download_khatrimaza.pdfIn PDF document text
    • https://eaa62ee9-779c-4a2d-9f50-6c66b019a99c.filesusr.com/ugd/1cc777_27848f0d660746fb87513142c9d58b1d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/2063866745.pdfIn PDF document text
    • https://09972071-4174-499b-90b1-de3619f59f53.filesusr.com/ugd/d1c05f_e3c4dcaa34ff409490df8e4cff148ecb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/simujix/vakibawaxerorexazaladub.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/20433174330.pdfIn PDF document text
    • https://128fc002-9ed4-4a8f-9a6b-83b43563a9ed.filesusr.com/ugd/6812d7_d98d4fc896e24c23a0327544e8e6fe38.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nigimul/cambium_networks_epmp_force_180_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/software_user_manual_template_latex.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/power_electronics_jobs_in_houston_tx.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/candy_crush_soda_saga_game_hack.pdfIn PDF document text
    • https://7c9e9c40-2b96-4f88-8065-b5ff5e495659.filesusr.com/ugd/3bfcae_c7af1a4fb2bc4e1fa511905449dc8f8f.pdf?index=trueIn 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_off0000d22c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22C 5960 bytes
SHA-256: f99bffd04e37a20f4c9f76d221ef00cda06e859895ab021e50ab10325bf877bd
font_01_sfnt_off0000e685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE685 10968 bytes
SHA-256: 9d5aa39ce36ec1a3a9bba18087cba557bdd7899612b4bbbf9970ab8243e91282

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