Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3e72c16b989081e…

MALICIOUS

PDF

45.7 KB Created: 2020-10-10 00:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b8465349fe541f863978c721c0cbd25a SHA-1: 61efdacef6b888736d116bc79ec501e0f706fab8 SHA-256: a3e72c16b989081e2e488d2f6635b3cefd2496540e76072de0a289a1be9de708
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://gettraff.ru/strik?keyword=specialized+hardrock+bike+review In PDF document text
    • https://site-1043489.mozfiles.com/files/1043489/68645987900.pdfIn PDF document text
    • http://files.pnmassoc.com/uploads/1/3/0/8/130814601/jalapovi_nagizeratup_xefogudorovom.pdfIn PDF document text
    • http://zegopu.gogginslonestarfarms.com/uploads/1/3/1/4/131438474/nedozurivegoda_motajigokimu_mejogavetov.pdfIn PDF document text
    • http://files.ejpmusic.com/uploads/1/3/2/7/132710780/xejirunisow_ketopiramemo_godikosevirap.pdfIn PDF document text
    • http://wopupori.localgestures.com/uploads/1/3/0/7/130739635/fd184cc069.pdfIn PDF document text
    • http://files.road2hollywood.com/uploads/1/3/1/4/131410434/bapukimerisade-dodaf-bogorax.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/1/0498/4868/0610/files/gagogexapi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2725/9811/files/unfair_mario_games_for_bears.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3329/6028/files/20018432939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/4742/3652/files/woguritadizeze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6835/0873/files/nightcrawler_script_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8454/6209/files/kohler_choreograph_customer_reviews.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8771/9320/files/18194809393.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8538/0246/files/summitview_middle_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9670/5697/files/pathfinder_kingmaker_regongar_build_fextralife.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_off000073e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73E9 5492 bytes
SHA-256: 8de6a7a58ca617dfc4bd712be70bd026ffc0e952fe4c5855e83a282bb425b87d
font_01_sfnt_off000086a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A4 10196 bytes
SHA-256: 35f701ceb2914a69d13768114d307847bc587f93500e2648d5f3d61089ab6e95

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