Malicious PDF — malware analysis report

Static analysis result for SHA-256 16974d207295b3d6…

MALICIOUS

PDF

49.6 KB Created: 2020-10-02 20:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 78aab9444e479b1603fcff2686bf3bec SHA-1: a550c37f63c2fcab582c28adda46e841901dea92 SHA-256: 16974d207295b3d68473c9019a2c63b0bad6321b3f4bb5619e51b6457b8cdbab
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=adverbial+phrase+examples+with+answers In PDF document text
    • https://site-1037221.mozfiles.com/files/1037221/57799531582.pdfIn PDF document text
    • https://site-1036764.mozfiles.com/files/1036764/lanalatajasovazi.pdfIn PDF document text
    • https://site-1037842.mozfiles.com/files/1037842/46396535981.pdfIn PDF document text
    • https://site-1037003.mozfiles.com/files/1037003/botozamajogalotaj.pdfIn PDF document text
    • https://site-1037121.mozfiles.com/files/1037121/vipagedab.pdfIn PDF document text
    • http://zamematir.tintawitaelderliving.com/uploads/1/3/0/8/130874038/8938673.pdfIn PDF document text
    • http://files.revivalrestorethevis.com/uploads/1/3/1/0/131070581/bdf4048721d5802.pdfIn PDF document text
    • http://files.actualcharges.com/uploads/1/3/1/8/131872146/508945.pdfIn PDF document text
    • http://rekamipov.wendybusch.net/uploads/1/3/2/6/132695550/37e4f.pdfIn PDF document text
    • http://vujuja.heidiho.org/uploads/1/3/2/3/132303001/d8451e33.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/1/0430/7812/3680/files/the_escapist_unblocked_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0502/0840/files/oster_pro_1200_blender_smoothie_cup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7435/5351/files/jak_and_daxter_ps4_trophy_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/6696/0293/files/blade_runner_2049_watch_online_putlockers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7195/5353/files/jofolapaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2182/0319/files/simple_and_compound_interest_problems_with_solutions_in_hindi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7118/3775/files/wonunefedemakilikiluza.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2D 5548 bytes
SHA-256: 76a03923584c47ab3cbd03ec6afc31baf8cf202feb8132ce2e0e68e1b3f56e91
font_01_sfnt_off000080f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80F1 10356 bytes
SHA-256: c71772662e9935bf4ef1a8c0c00cb9ac2d7a3ee1ff204e7828e90e535459bbbb
font_02_sfnt_off0000a461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA461 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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