Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cce23bfa924577a…

MALICIOUS

PDF

49.0 KB Created: 2020-10-02 18:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 63dafeacdfe895e4d8ae3188552f3890 SHA-1: e32e2083dd7fa44ae3543c1ab14fd2b67c5986e5 SHA-256: 7cce23bfa924577a1fbe225a830dbc71ecd4cc49ec3981f543d2f56d9619f36f
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=oxford+communicative+english+resource+book+class+10+pdf In PDF document text
    • http://files.faithtemplebelfast.com/uploads/1/3/0/8/130814729/594100.pdfIn PDF document text
    • http://files.tiernytasslerskincare.net/uploads/1/3/0/7/130776786/5037051.pdfIn PDF document text
    • http://jujet.taylordumasdesign.com/uploads/1/3/2/6/132681409/2d8f89c84805d5b.pdfIn PDF document text
    • http://files.musicbyreggie.com/uploads/1/3/0/7/130739039/nuzaxama.pdfIn PDF document text
    • http://zemej.newentorchestra.org/uploads/1/3/0/8/130874493/pelexugetuvi_rumabivirasimoj_xirilone.pdfIn PDF document text
    • https://site-1037860.mozfiles.com/files/1037860/wukipexakajubitaf.pdfIn PDF document text
    • https://site-1037010.mozfiles.com/files/1037010/jemev.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/1/0437/2021/2635/files/fodeludotatop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4948/0092/files/lazarus_log_homes_whitefish_montana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0459/1255/files/can_tortoises_eat_orange_leaves.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2939/3308/files/22254257456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7852/4832/files/eurylochus_in_the_ac_odyssey.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0157/7625/files/pink_car_seat_covers_target.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7818/0259/files/tesiragifodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/6627/2160/files/h2_physics_definition_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3095/4655/files/63730823354.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_off00007f1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1C 6120 bytes
SHA-256: 8e0a80255379ab0e9a71f7909c0cf014f3a5308c30a19a55447d4e9c05c291f8
font_01_sfnt_off000093ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93CE 10076 bytes
SHA-256: 831726f086a688ba607e6eb3c8e448be2a480d88683109e2b1276b695744c835

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