Malicious PDF — malware analysis report

Static analysis result for SHA-256 852a3e1e2bcf2bc9…

MALICIOUS

PDF

48.3 KB Created: 2020-09-30 00:41:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: c7b8fd510cb686d835dafb41d2d24a67 SHA-1: 7570146aefca1dba7f1f5a80f6a96c9427e2c9f1 SHA-256: 852a3e1e2bcf2bc9fb63396eadcc6fa0a6b4e768394a23b0f59f1a4819525eb6
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=rbse+books+download+in+hindi+pdf In PDF document text
    • http://files.joyneruphorsemanship.com/uploads/1/3/1/3/131379832/jajejeritaso.pdfIn PDF document text
    • http://batoweni.horsetradertricks.com/uploads/1/3/2/3/132303168/mawolix_xonawero_levexufasatewo_nemibutegusetol.pdfIn PDF document text
    • http://zibilaka.yourjlca.com/uploads/1/3/1/4/131407102/8327826.pdfIn PDF document text
    • https://site-1037175.mozfiles.com/files/1037175/nejodep.pdfIn PDF document text
    • https://site-1036874.mozfiles.com/files/1036874/45216557023.pdfIn PDF document text
    • https://site-1037098.mozfiles.com/files/1037098/difidudeg.pdfIn PDF document text
    • https://site-1037143.mozfiles.com/files/1037143/46363326485.pdfIn PDF document text
    • https://site-1036996.mozfiles.com/files/1036996/jixizod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/4385376465.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7569/7830/files/39893493380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/24740681145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5504/6560/files/xomejirobibamowot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2657/7565/files/conservation_of_matter_5th_grade_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9543/2099/files/john_deere_gx75.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/wallpaper_anime_naruto_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/babarevuviwumere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4297/1553/files/ratiberanamegavupo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C2 5336 bytes
SHA-256: 9ce74292fb40103fe1fbd00615c32eebe35b9725c53214934846723b010a60d8
font_01_sfnt_off000073fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73FC 10088 bytes
SHA-256: 6799d186167143a6ada484874add79da642b46902a7f15a546c1ae90599a0433
font_02_sfnt_off0000966d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x966D 8984 bytes
SHA-256: 9b102618ab9e2f702080e0573869da3e48f4325bb785f91b764d2511daf7083e

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