Malicious PDF — malware analysis report

Static analysis result for SHA-256 7281728f4eb68a98…

MALICIOUS

PDF

43.4 KB Created: 2020-10-11 01:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 39a0aa78976e6a2671c17e765b0857e0 SHA-1: e8984339a1fb8a1b31e382ba8c43a7fbf56ff4f9 SHA-256: 7281728f4eb68a98de3711b122e5f5d0ed740c10054054ed0cdfdc22a925b2de
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/pify?keyword=windows+7+trustedinstaller+service In PDF document text
    • http://files.morganofsharick.com/uploads/1/3/2/7/132740564/5343486.pdfIn PDF document text
    • http://files.kangaroohavenwildliferescue.com.au/uploads/1/3/2/6/132695732/7915761.pdfIn PDF document text
    • http://files.innovativetherapysolutions.net/uploads/1/3/1/3/131383630/bekudimuzupuji.pdfIn PDF document text
    • http://sopipuwep.aedl2012.com/uploads/1/3/1/4/131483453/buroj.pdfIn PDF document text
    • http://files.covid-logic.com/uploads/1/3/1/4/131406403/luxilipudakinul_sotizuwumomifu_tobide_givivowazesal.pdfIn PDF document text
    • https://site-1036761.mozfiles.com/files/1036761/77210931188.pdfIn PDF document text
    • https://site-1043606.mozfiles.com/files/1043606/71662197406.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/1/0432/5251/4979/files/cell_reproduction_note_taking_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/6046/5316/files/supanifuwenenuki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7868/3291/files/backpack_blower_rack_for_enclosed_trailer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8820/7255/files/lopivipunor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1323/7667/files/12300676165.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4920/5405/files/recanalized_umbilical_vein_ultrasound_images.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6629/0076/files/boruwizelaxodeso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6447/5299/files/febajobujoninaki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4104/7206/files/1285476464.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8543/8883/files/97780525648.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA0 5176 bytes
SHA-256: 02901bd45ac599ff0a0216914d5eb2c518218ddabc09460923f37dc416bcbeb9
font_01_sfnt_off00007d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D69 10352 bytes
SHA-256: 35c34e01ba33febe49edb3016f044aeafb442941134d5535821ad833ca4bcc9a

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