Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffa2a3f6f02b2919…

MALICIOUS

PDF

84.2 KB Created: 2021-02-24 23:12:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e461ddb4de70f4ebfec2ffc2a3a20116 SHA-1: 4ab6e779bfe051c7936b0e7268eca2c0e22a78d0 SHA-256: ffa2a3f6f02b2919cfcaa849df1ee5de56afaba08ba8d183c4ca71cba15709c2
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a lure related to 'Fire and ice game of thrones ending' and multiple external URLs, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, likely leading to further payload download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/123?utm_term=fire+and+ice+game+of+thrones+ending PDF link annotation
    • http://huseyincanx.com/14641945341z71i2.pdfIn PDF document text
    • http://jirafka.space/licorne_crochet_tutofe8da.pdfIn PDF document text
    • http://penageli.getenjoyment.net/danby_premiere_dehumidifier_ddr60a3gp_not_working.pdfIn PDF document text
    • http://contentmedialiteracy.com/what_are_the_4_ps_of_social_marketing_please_provide_an_example_of_eachgd8g3.pdfIn PDF document text
    • http://trenketo.buzz/93368491266nquti.pdfIn PDF document text
    • http://afracheat2.xyz/movie_theater_hollywood_connection65d8g.pdfIn PDF document text
    • http://vipadobotisituz.mygamesonline.org/mawanivemekiwezujomodo.pdfIn PDF document text
    • http://rubka.space/87020021239pheg4.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/triangle_congruence_test_answer_key.pdfIn PDF document text
    • http://ecosbor.net/511457909048ls9x.pdfIn PDF document text
    • http://sallely.xyz/how_much_is_a_galaxy_s9_worthqhsfd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/draft_beer_list_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/22359922147.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/25035190087.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/festool_jigsaw_blades_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/libikijotawezevuretumi.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/piwalefu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD07 5144 bytes
SHA-256: 97ef97b544c7004059ba00378d2be8244235730d3e454078f11ed343e9657fc1
font_01_sfnt_off00010e55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E55 11860 bytes
SHA-256: 72bc648ad5574d7e2f34cf113ac0bbe3377e01171780c9f04848f9d5b43998ad
font_02_sfnt_off000135c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C2 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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