Malicious PDF — malware analysis report

Static analysis result for SHA-256 414254015a890fd5…

MALICIOUS

PDF

40.6 KB Created: 2020-10-18 02:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 088e2575f13c088e674a6f00766e6b9c SHA-1: 3ba08e5c9ffd3a55789c4429747d4b265b2c39de SHA-256: 414254015a890fd5c586fa252696de096e5e36857b4d4a08e5c8724513b3de10
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://ttraff.com/123?keyword=root+words+pdf+for+ssc+cgl In PDF document text
    • https://wuwenivavubujer.weebly.com/uploads/1/3/1/4/131437756/nuwove.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/77429035c.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/najemivipon.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/038885c85ecf8f0.pdfIn PDF document text
    • https://godadonalizubo.weebly.com/uploads/1/3/1/4/131437317/3480128.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/nexamif.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/1760674.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/lanadez.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/1/0483/5953/8851/files/squad_leader_tournament.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1751/0818/files/39451427511.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9604/2398/files/how_to_put_cc_in_gmail.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4480/6042/files/gerber_mark_iii.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8941/9676/files/custom_spinner_item_layout_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/7589/3918/files/how_to_remove_google_ads_with_apk_editor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0886/0575/files/what_are_levees_in_geography.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5088/4008/files/soal_dan_pembahasan_usaha_dan_energi.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_off000061fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61FC 5212 bytes
SHA-256: c45eee01e4be57211bfcc2adbc1f9bce8ffed8a27cb2c1fac62f26ed8122936d
font_01_sfnt_off000073ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73EC 9936 bytes
SHA-256: ee9c2be06ee43acd27f73c699bb0b05664adb4d25262fc2076b69316e1657c46

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