Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1837471df025371…

MALICIOUS

PDF

41.3 KB Created: 2020-10-04 03:01:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5c0e028941457c638f6da25d876630c2 SHA-1: 62ff3a6bd930baefeacd6b31d8a84965b675d34e SHA-256: b1837471df025371aa9764bec6e56415037a240c3cafb24eb2896c049fade381
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=bottomless+lakes+state+park+map In PDF document text
    • http://files.drak-arts.com/uploads/1/3/2/7/132712593/69d3604e16622.pdfIn PDF document text
    • http://nefunafuz.latebloompaperie.com/uploads/1/3/0/7/130738870/nizotuxe.pdfIn PDF document text
    • https://site-1042590.mozfiles.com/files/1042590/91238528455.pdfIn PDF document text
    • https://site-1036955.mozfiles.com/files/1036955/6404860598.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2775/9257/files/best_cosmic_bowling_near_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1452/6872/files/pace_soldering_station_mbt_250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2915/8295/files/86143427897.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/36033270405.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8352/5015/files/makosozezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2779/8944/files/delete_vs_truncate_postgresql.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_off0000589a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x589A 4712 bytes
SHA-256: a1fd1cea29ad24848f211d3df4f45d12662e430194bcefffdbb766c29683aeaf
font_01_sfnt_off0000689a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x689A 9860 bytes
SHA-256: 5cca57daffd9611d58bb81c7a6ec94a7e47c0f197ef4ad0aa3e105f33925311c
font_02_sfnt_off00008a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A66 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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