Malicious PDF — malware analysis report

Static analysis result for SHA-256 a78b524465b6b4c8…

MALICIOUS

PDF

40.2 KB Created: 2020-10-05 02:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: cdafed8a1c66ce91c36340b822730a7f SHA-1: 143fa8e974cb49b43acd3fb431a317ebc45595f7 SHA-256: a78b524465b6b4c83f11298def270642fc25197c7b0cc7e44d03f157ebac0438
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=kiran+reasoning+book+for+bank+in+hindi+pdf In PDF document text
    • https://site-1043195.mozfiles.com/files/1043195/bizidetetubudo.pdfIn PDF document text
    • https://site-1038674.mozfiles.com/files/1038674/lusexakenavasapirupirewid.pdfIn PDF document text
    • https://site-1036982.mozfiles.com/files/1036982/libofapopepoxuvuwoses.pdfIn PDF document text
    • https://site-1038882.mozfiles.com/files/1038882/bifawevosolora.pdfIn PDF document text
    • http://files.daphnematthewswriter.com/uploads/1/3/2/7/132740700/73cfe4cd.pdfIn PDF document text
    • http://files.thornhillactingstudio.com/uploads/1/3/0/7/130775528/papagubela.pdfIn PDF document text
    • http://menifa.sjsbeacon.com/uploads/1/3/0/8/130814297/6879907.pdfIn PDF document text
    • http://files.obchaymarket.org/uploads/1/3/0/7/130740563/3700323.pdfIn PDF document text
    • https://site-1038567.mozfiles.com/files/1038567/pivekejum.pdfIn PDF document text
    • https://site-1040561.mozfiles.com/files/1040561/fojawalubupuwojezasokirik.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/1/0431/1672/4386/files/jitosisiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9302/4151/files/57298588660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2359/2355/files/pbs_dna_workshop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4257/8332/files/what_is_rimfire_rifle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3477/9553/files/ridop.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A30 5444 bytes
SHA-256: 5c89fc98cf216c9768576074b26d32efa5e8bf69877bca6542613e792ce3d81a
font_01_sfnt_off00006ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA8 12076 bytes
SHA-256: 333c9e72faa89b0a85e64330b6c5ab39ab2d0260ae74568e4a2b1006248a6b46

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