Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdea478d28b6d96f…

MALICIOUS

PDF

51.9 KB Created: 2020-10-14 22:37:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5abfd002b2fcb59727f4692e2b27314a SHA-1: 7f8811cc700b1bddcde58fce2379e75a422bde4c SHA-256: bdea478d28b6d96f95ba6e7923562ae50b04f3a0da308a588e20413370687bcc
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=liquefied+gas+handling+principles+4th+edition+pdf In PDF document text
    • https://site-1039174.mozfiles.com/files/1039174/jodekagoputege.pdfIn PDF document text
    • https://site-1041944.mozfiles.com/files/1041944/56623950772.pdfIn PDF document text
    • https://site-1038827.mozfiles.com/files/1038827/68640339085.pdfIn PDF document text
    • https://site-1036754.mozfiles.com/files/1036754/29127851216.pdfIn PDF document text
    • https://site-1042551.mozfiles.com/files/1042551/46477443572.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f8730780df85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5f86f4755131b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f871f97783ce.pdfIn PDF document text
    • https://site-1048515.mozfiles.com/files/1048515/napenegazufikuvav.pdfIn PDF document text
    • https://site-1041388.mozfiles.com/files/1041388/wigatogiragi.pdfIn PDF document text
    • https://site-1042886.mozfiles.com/files/1042886/sodejexivimuroxexakozij.pdfIn PDF document text
    • https://site-1039229.mozfiles.com/files/1039229/vodoxebiporuzugexojulow.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/1/0481/7751/2597/files/accounts_payable_in_sap_resume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2741/4171/files/noxegijagefig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/6027/2808/files/nuwabufememijumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9501/4056/files/89264795989.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/3855/0427/files/sutuvonadumilida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9254/4162/files/auriol_rc_alarm_clock_4-ld4948-2_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0205/1229/files/apple_island_resort_cabins.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2210/4222/files/wofexijol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3802/7161/files/pinch_hitter_2_unblocked_hacked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5805/5318/files/kelloggs_memphis_plant_closing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7698/8309/files/differential_rate_law_for_second_order_reaction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7537/9101/files/5492757253.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_off000082d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D1 5572 bytes
SHA-256: 7bfc7c95ab819c1a509e3b2949c0998bfae14405eeceba52976f5f40a1c80b32
font_01_sfnt_off000095bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95BC 14208 bytes
SHA-256: 814e4194fcc4fa511e953178c4569472e4e17aa1b2773529d95d99c5b968afbd