Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d782f8b30b83bb3…

MALICIOUS

PDF

46.8 KB Created: 2020-09-30 16:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 5d97f481496f36dd57cef19e4b11c628 SHA-1: 742c6b281d4186f354e13c31c841b899fe723f07 SHA-256: 5d782f8b30b83bb3fae27e188ab9b812c94cc12b06eb3f0a5f7c4b9c0830c544
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://ggtraff.ru/strik?keyword=addition+and+subtraction+of+integers+word+problems+worksheets+pdf In PDF document text
    • http://files.summerleeellis.com/uploads/1/3/0/7/130739824/xajoputagije.pdfIn PDF document text
    • http://giset.daniellegrisnich.com/uploads/1/3/0/7/130775162/kojudob.pdfIn PDF document text
    • http://kaxurit.aznutritiononline.com/uploads/1/3/2/6/132695744/renozobukafek_favuwa.pdfIn PDF document text
    • http://nofutonet.mooresgreenhouse.net/uploads/1/3/1/0/131070705/fofogul.pdfIn PDF document text
    • http://files.criticalthinkingatwork.com/uploads/1/3/0/7/130776826/xofimebizoji-mafatajipi.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/1/0430/6577/0135/files/bezokafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1579/8693/files/delonghi_safe_heat_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1080/9256/files/bakunin_estatismo_y_anarqua.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7387/1767/files/building_the_barn_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/9124/1634/files/apologies_that_never_came_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7471/4790/files/21971504078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/zanivavexegediw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9720/1576/files/74255985087.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/faparuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/genesys_character_sheet_fillable.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_off00007616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7616 5856 bytes
SHA-256: 130ea747ce2cbd6fc7fb2f9f53405e0a0b9df3a876ba2721dc9ffbfcd346136c
font_01_sfnt_off000089ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89EA 10524 bytes
SHA-256: b0fbca473202a4cb5d21b658d9c355c19e1fb381646fe6bf4e2597276c065f5c

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