Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a76a2977becf7d4…

MALICIOUS

PDF

40.0 KB Created: 2020-10-04 13:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 63b6d0daab002c4117502645a56c401f SHA-1: a8c358a23317110279452eda311417c137b4bd85 SHA-256: 5a76a2977becf7d493136ec0afca6b5bca2a2c9d649d9b5874a5b0c837e2dc74
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://ggtraff.ru/strik?keyword=minecraft+extreme+reactors+guide In PDF document text
    • http://files.luxeymaison.com/uploads/1/3/2/8/132814996/a48aacdd34.pdfIn PDF document text
    • http://files.allermuirkp.com/uploads/1/3/2/6/132681156/6288563.pdfIn PDF document text
    • http://files.wheaten.se/uploads/1/3/1/4/131453399/vovelusofidewizotet.pdfIn PDF document text
    • http://files.tuneduplife.com/uploads/1/3/1/1/131163683/mowigedof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/820d5f11-2e90-4949-94aa-57b7505cf893/35722358819.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/329b2668-aa5a-41e1-ae7e-ab5390d762bb/wifopezikawiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57661a9e-3c42-483e-8aea-4f7fd243a216/15231737376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/052a22f5-6c55-41bf-bca4-122db6ddeda2/romiku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f07fe61-2158-4966-9506-c44cf279add1/sawuravusosivalajik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1214/5830/files/fejawebufobepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9755/7654/files/kulasizexage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7718/4925/files/labeled_map_of_island_of_the_blue_dolphins.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4288/8097/files/federal_odometer_statement_california.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1338/1028/files/thrustmaster_ferrari_458_spider_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/6772/3942/files/waves_review_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4487/1080/files/35479459381.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_off00005eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB4 5380 bytes
SHA-256: b562fc16e407381fdcace391209db9efb6ffeb4c79eab32b0c51d7f54f7f5f28
font_01_sfnt_off000070fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70FC 9996 bytes
SHA-256: ae75d72b3b1ccf7abe7849af9edb170ca3c794590832e244709afdd58ea86ef6

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