Malicious PDF — malware analysis report

Static analysis result for SHA-256 d39522a0edb39c4b…

MALICIOUS

PDF

72.9 KB Created: 2021-03-04 16:38:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 34e8b9e8645b22ac0689fb74bd329b41 SHA-1: 23e8fcf0247b0731910923a9979bf89fb09f1d4d SHA-256: d39522a0edb39c4bbb23492fb44812bfee66300417a1097f9205cb5a93df7528
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/wix?keyword=isk+the+guide PDF link annotation
    • https://wawulawad.weebly.com/uploads/1/3/4/8/134872625/b4b6a84afc8.pdfIn PDF document text
    • http://newipufisatag.scienceontheweb.net/what_is_the_rising_action_of_the_story_thank_you_maam.pdfIn PDF document text
    • https://nurafotupitu.weebly.com/uploads/1/3/4/4/134495453/9f103deb58efd7.pdfIn PDF document text
    • http://wuwoxus.22web.org/used_9.9_evinrude_outboard_motor_for_sale.pdfIn PDF document text
    • http://gejudoxe.mypressonline.com/lodixaxeze.pdfIn PDF document text
    • http://vemasujananexu.22web.org/android_emulator_for_pc_to_play_games.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/jirebonudur/9063801831.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/47673868033.pdfIn PDF document text
    • https://661c91a2-68a2-4ae3-aaac-ef96b6cc7894.filesusr.com/ugd/b926a8_375efc4fe59840068e85b5c0cb61a90b.pdf?index=trueIn PDF document text
    • http://sevezogare.rf.gd/30094524750.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/monogiwalusesata.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/wadafubevidid.pdfIn PDF document text
    • http://remofexemuja.rf.gd/37730907838.pdfIn PDF document text
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_ffdce6323762493bbfc89c89752f3e37.pdf?index=trueIn PDF document text
    • http://vamagirizotaro.rf.gd/6828941820.pdfIn PDF document text
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_575b4a0ead594dd8b69feb2641c5e454.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zalomi/17478425922.pdfIn PDF document text
    • https://626fb5af-1d67-41cb-86ce-204163677ff0.filesusr.com/ugd/9d869b_fdf56cb4fc4a418da77feed36c1713af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mulerux/pokemon_battle_revolution_for_pc_full.pdfIn PDF document text
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_6ada1366ab37449d9b29986ab93abf73.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/livros_em_ingles_para_iniciantes_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/jade_regent_pathfinder_trove.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_off0000e3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B1 4748 bytes
SHA-256: 0c8453bd56f4a6acde48e0209281dd4809a983d2307170c308aab7b51c67c23e
font_01_sfnt_off0000f3da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DA 10236 bytes
SHA-256: a56eeb6d8b9ec754c3baa912668c690c38379d3507cd029344380aa85c1ab037

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