Malicious PDF — malware analysis report

Static analysis result for SHA-256 53fd12bec144c084…

MALICIOUS

PDF

45.6 KB Created: 2020-10-16 00:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d107b82119db70e724c018b402f51d44 SHA-1: 1ce9599fd08f96f9741a6ff218262cb19466f7aa SHA-256: 53fd12bec144c0848578a255288bd9b362d92da0b6c97e966aa7fe4be5744c05
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/pify?keyword=electronic+devices+gate+notes+pdf In PDF document text
    • https://site-1043051.mozfiles.com/files/1043051/kodak_alaris_s2040.pdfIn PDF document text
    • https://site-1037864.mozfiles.com/files/1037864/86115595845.pdfIn PDF document text
    • https://site-1037130.mozfiles.com/files/1037130/kesitepanugewunepuzarebe.pdfIn PDF document text
    • https://site-1042349.mozfiles.com/files/1042349/65183500789.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/pupaxowor.pdfIn PDF document text
    • https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/7879e5a.pdfIn PDF document text
    • https://site-1048209.mozfiles.com/files/1048209/33411055472.pdfIn PDF document text
    • https://site-1040313.mozfiles.com/files/1040313/delete_file_in_java.pdfIn PDF document text
    • https://site-1043690.mozfiles.com/files/1043690/1587341290.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1260/3035/files/dummy_never_fails_unblocked_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7354/9974/files/empire_of_liberty_book_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8522/4872/files/rapijozewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2549/6736/files/tlcharger_mac_gratuit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/6765/4311/files/winupadafelewib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0921/5134/files/16931102458.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6625/7308/files/weber_performance_horse_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9979/1268/files/topdog_underdog_lincoln_monologue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7785/1553/files/the_endocrine_system_quiz_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3136/6298/files/frigidaire_dehumidifier_at_lowes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2623/6071/files/input_output_error_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5696/2467/files/esquema_de_la_comunicacion_codigo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6480/2982/files/excretory_system_worksheet_answers_doc.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_off00006af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF5 5340 bytes
SHA-256: 8b4b06e431d5a2d52c9646d03925bf394920262de8b6d5655d8a7f488fd6e880
font_01_sfnt_off00007d2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2E 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off000085bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85BC 10256 bytes
SHA-256: 85e4e9e2d2d6137b2aecff62ca4bb0ac6d6306ad87ef62ef850202ccdc66807e