Malicious PDF — malware analysis report

Static analysis result for SHA-256 530e8d44d0f16c17…

MALICIOUS

PDF

57.1 KB Created: 2020-10-04 06:41:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2580c2d18d0ce446086128837673f66c SHA-1: ec65af5b089bd738b196ae1343ccfc0ffadb5489 SHA-256: 530e8d44d0f16c1762c045090a697208fae51b6e1ceb4939b0ad29d9aa914d69
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://cctraff.ru/strik?keyword=how+to+create+wealth+investing+in+real+estate In PDF document text
    • http://nofelol.alex-chien.com/uploads/1/3/0/8/130814328/xanafugusutoti.pdfIn PDF document text
    • http://files.calebericksonmemorial.com/uploads/1/3/1/6/131606467/xopenodupipotoset.pdfIn PDF document text
    • http://files.creativeliteracyturku.com/uploads/1/3/2/6/132696274/pilesaxo-zozojo.pdfIn PDF document text
    • http://welakag.albertabands.com/uploads/1/3/1/3/131398285/4178165.pdfIn PDF document text
    • http://files.atlasbible.org/uploads/1/3/1/3/131381658/kojavejeponoro_tefezukag.pdfIn PDF document text
    • https://site-1039600.mozfiles.com/files/1039600/12605520730.pdfIn PDF document text
    • https://site-1036987.mozfiles.com/files/1036987/30021303672.pdfIn PDF document text
    • https://site-1038323.mozfiles.com/files/1038323/babijawemom.pdfIn PDF document text
    • https://site-1037160.mozfiles.com/files/1037160/galesenadoxulomigoguvava.pdfIn PDF document text
    • https://site-1037156.mozfiles.com/files/1037156/71411653315.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/1/0431/6567/9776/files/enya_dark_sky_island_cd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/3760/0155/files/mutant_x_tv_series_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0111/9398/files/f_tables_for_anova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5470/1463/files/63446477754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7945/3854/files/bismarcks_foreign_policy_may_be_judged_as.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7916/6873/files/mogemadobu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/7168/5027/files/15581351358.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_off00008d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D88 5172 bytes
SHA-256: d5ba69d9fcfe416dd64e849fa0b5fe78cf8f128031b864fcdb6552717b381a5c
font_01_sfnt_off00009f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F2C 9940 bytes
SHA-256: cb433a572c6353e6c473c17fd4c1c066b7442953a97847a777b8c57cad97d03a
font_02_sfnt_off0000c15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC15C 16144 bytes
SHA-256: 18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b

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