Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fe7d82b6772e256…

MALICIOUS

PDF

50.5 KB Created: 2020-10-18 03:00:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 0672780a68190a1a82ebcc0ca1058e05 SHA-1: 025522434e8ac8aceaafdda27d9e1e6c42cb2345 SHA-256: 8fe7d82b6772e25609d08a845f79164630e4a30c7ddee0c3e632d9ac9f101e28
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://ttraff.me/123?keyword=manuales+tecnicos+en+ingles In PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/1782758.pdfIn PDF document text
    • https://rokufekajo.weebly.com/uploads/1/3/0/8/130814342/93df0acae693.pdfIn PDF document text
    • https://mujunoba.weebly.com/uploads/1/3/2/6/132682006/zogevitalela.pdfIn PDF document text
    • https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/bekexis-vikufojig-golifivop.pdfIn PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/3261591.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369305/normal_5f88475c17f80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366336/normal_5f87cba379cbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368770/normal_5f8b65f48978b.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/221088.pdfIn PDF document text
    • https://wuwenivavubujer.weebly.com/uploads/1/3/1/4/131437756/danepomivusid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1054/7099/files/ina_garten_pie_crust_all_butter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1856/9896/files/osrs_woodcutting_guide_p2p.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2166/1856/files/pamovap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4388/0611/files/29102960650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1123/4199/files/57712766352.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/0623/2229/files/nazefugegubamixa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5008/1690/files/noxopiwirutija.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8878/2517/files/mamma_mia_free_full_movie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5468/4565/files/85737272320.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59C6 6284 bytes
SHA-256: 287acc2d620d19b9596c09776c8b85e7470d06c69e7b097866d2dd96b99ae728
font_01_sfnt_off00006f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F80 4876 bytes
SHA-256: f2845b71c3f62efb61b1523d76665350db01acab933b2ca6b41a73bafa528a7e
font_02_sfnt_off00008021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8021 7992 bytes
SHA-256: 221ffc50cbb2a6358f040c3a5f6690d2d082a78c806af6cf10057ed17d7c0422
font_03_sfnt_off00009600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9600 11284 bytes
SHA-256: 5a2d5f81bef10a2e1e2e7c3f70e849eee8c75d0621969bc8257b3bfffa17758c

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