Malicious PDF — malware analysis report

Static analysis result for SHA-256 57a0c3c3ff020331…

MALICIOUS

PDF

73.9 KB Created: 2021-03-10 11:44:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4f56a53a02c006be3ee541106cf0ea81 SHA-1: b8700e242345e3dc4056c009784c376b3e8d4271 SHA-256: 57a0c3c3ff020331d7549822a26922970f56764370ca4e9293ce246bc11260f4
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-severity rule indicating it's an image lure linking to an SEO redirector for phishing. The ML classifier and ClamAV also identified it as malicious. The primary malicious URL identified is https://botokaw.ru/award?keyword=sixth+grade+social+studies+worksheets+pdf, which is presented as a link to download worksheets but likely leads to a phishing or malware distribution site.

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://botokaw.ru/award?keyword=sixth+grade+social+studies+worksheets+pdf PDF link annotation
    • https://cdn.sqhk.co/mekurapiw/FYleHia/moto_bike_delivery_heroes.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutowede/jQgghbF/toy_town_make_money_free.pdfIn PDF document text
    • https://cdn.sqhk.co/lizuloka/beRiZ86/9287314120.pdfIn PDF document text
    • http://xuwamamesatopa.22web.org/whistle_blackpink_video_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/icbjhid/alchemy_discovery_339.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/fhjLjfz/bloons_tower_defense_2.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/lorerexeg/dizorefekafagixafawabonir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bc39fe6-d15c-4e83-b49d-9a19e746748c/pajedilekivoleguxudivox.pdfIn PDF document text
    • http://nawuxek.rf.gd/kugegusixuvewojumapopivom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66406bca-deeb-44d1-a5e7-18723b49f592/ditepexuvuzamobikekepow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/605480f2-9fb4-4adf-926d-25fde27b4a73/asus_xonar_dgx_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cc9a117-afe2-4244-b4f1-e4692abd6942/how_hard_is_the_clep_english_composition_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b00ff0c-58b4-4ab9-9758-16553f3d2152/84844624037.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/arraylist_vs_vector_in_java_performance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f01a3633-ccf6-4ef1-acf2-8921e3e1ad0e/rivove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c69f1bf4-4718-4f08-abca-6918b08f8775/lean_ux_canvas_template_download.pdfIn PDF document text
    • http://melewurimepuja.rf.gd/25570070953.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/78795405727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/921e734a-41ab-4b87-a68b-23c1a830f81b/87996560.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_off0000e414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE414 5744 bytes
SHA-256: 1409165ee38eea01084ea8932c82f15e6ca36f68cd8fa104e69044a3d12e7830
font_01_sfnt_off0000f7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BA 10132 bytes
SHA-256: a7109355fbcf8e697467c721f006c842662c61eb778d9afce31d4d94ee941afb

Open this report in the interactive analyzer, or submit your own file for analysis.