Malicious PDF — malware analysis report

Static analysis result for SHA-256 c43a92835987a674…

MALICIOUS

PDF

50.5 KB Created: 2020-09-11 07:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 19ecb6763f36600ee46206aa36d72613 SHA-1: 6c9947072c1810f932b4f8e20772d9bf3ee41c93 SHA-256: c43a92835987a674e678a81353d9289e8e38e6ace8fb1a982cb2667f89656f04
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.cc/wix?keyword=balancing+chemical+equations+worksheet+answers+1-+21 In PDF document text
    • http://residajul.calvaryokinawa.com/uploads/1/3/2/6/132682646/8481677.pdfIn PDF document text
    • http://vewez.giocosonl.com/uploads/1/3/0/7/130775350/wobenati.pdfIn PDF document text
    • http://xuvopifa.thehockeyprofessor.org/uploads/1/3/0/8/130874426/lijulamuzo_dakow.pdfIn PDF document text
    • http://niziri.thelellowfoundation.org/uploads/1/3/2/3/132302868/d7af05eacc14.pdfIn PDF document text
    • http://jolaxoguv.utopiaskintherapy.com/uploads/1/3/1/4/131453109/wufirut_deribuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/cf14a4_d6c68a87a66c4d3bb7e01fbfa9661762.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d1c05f_86cd7fc7601149fd9ec6e4248696cdb2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b98abb_1520dcf2252d4768a60c42fe403db174.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/03a576_25cd047ea8694a5a8f2ee56d107f2bf4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5cf23b_aac5bec6288940a1aca7fe8e8b753bb8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bf57b5_53398f1d0b44404ab2b934de47afe1a0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/22bf55_5736fe19d4844f028655c1bfc11bb9c3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9212/3554/files/afera_podsuchowa_stenogramy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9455/6324/files/nujigepumokagoredufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2973/2245/files/6th_grade_math_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/7736/1813/files/best_sheet_metal_for_magnet_board.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0469/0522/9474/files/nivuk.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_off0000865b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x865B 5760 bytes
SHA-256: b625ce30895ac3952a4a21c4adc229a9d676087809fc8f0999dd8059e384dab7
font_01_sfnt_off000099ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99EA 10068 bytes
SHA-256: 98c0014c1d7bb6720b1c6c2043524e8e172b1e7a0c6937e0bb9cdd6ad2eb3060

Open this report in the interactive analyzer, or submit your own file for analysis.