Malicious PDF — malware analysis report

Static analysis result for SHA-256 3651302c231156d5…

MALICIOUS

PDF

41.9 KB Created: 2020-10-25 23:59:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 4ec74b25c2d623246df6ba43e14695b3 SHA-1: 25efd2e19056839d6263e55590df27d425eb0008 SHA-256: 3651302c231156d52a30cf1ea3c7c961cd531024b065afb4e9ac3b23b7300aa6
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.club/pify?keyword=change+word+doc+to+pdf+file In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377935/normal_5f8cb710bf4bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383460/normal_5f8d7cfc99869.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413125/normal_5f94831716188.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f8d66419f2f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374522/normal_5f90eb3e77af5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374715/normal_5f896937beba6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_5f8fa30d7bd44.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f62a387d-2094-47ae-927b-4021d5ee249b/woniluxubelelolajizuni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5103b88f-79a9-468b-9a7f-3654f2b3b815/gedom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/785fbe88-84e1-461e-ab53-db46aef7f221/95186474705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e10bb92e-29ba-4b70-a8fa-bf104985f388/27667947963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/817a80c5-2b86-4f9d-b27f-9bce58d853ef/tefilat_haderech_for_airplane.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/comparison_of_adverbs_and_adjectives_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/cracking_the_gre_princeton_review_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/holt_mcdougal_biology_textbook_download.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/convert_ke_word_i_love.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/kujixejuwakepepugiwunik.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/tesiwudesanebelavaditu.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/mathematics_for_economics_and_finance_anthony_biggs_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/16673895975.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_off0000640f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x640F 5236 bytes
SHA-256: d76c43805bd4b1404d10289cb582836f798264dd02b7b71b43e2291caf2415a1
font_01_sfnt_off000075e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75E6 10636 bytes
SHA-256: db765344b3ed8a9d807cfc56d8db8558899c4a203e2c1a951fd5d94d191566ac

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