Malicious PDF — malware analysis report

Static analysis result for SHA-256 23002e5cd285e82f…

MALICIOUS

PDF

45.3 KB Created: 2020-10-23 18:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: a950f183fb2f8b12c3127d6665a004e2 SHA-1: 64011133a9273ddd5dfa78fdbc0ed2a94075b00e SHA-256: 23002e5cd285e82f157966412f75d90e4cedb39a31aca93f757560cae23b1fbf
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.link/aws?keyword=bls+2015+pdf+espa%25C3%25B1ol In PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/7167709.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/zaweneg.pdfIn PDF document text
    • https://zugufavowi.weebly.com/uploads/1/3/0/8/130874222/2778795.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/3246326d745a.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/diresaku_fezigeleri.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/bamudepekepa_setumazowido.pdfIn PDF document text
    • https://vutizimowunofe.weebly.com/uploads/1/3/4/3/134354130/4932756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381291/normal_5f8ffadb9185d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5f8c6def65d1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369508/normal_5f89beaa49afb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f86faf177adc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369912/normal_5f88a7fc28c8f.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/1/0485/9320/7461/files/disk_or_disc_brakes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/5673/4630/files/chess_queen_moves.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/rugizubufemat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1818/2041/files/mupevesunivoxibiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/6063/4015/files/ati_b276_driver_windows_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6898/7813/files/4021938996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7810/0148/files/autocad_manual_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/8929/8076/files/21213732954.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/5559938908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9008/6561/files/powiruratitafok.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_off00007051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7051 5648 bytes
SHA-256: 835d19f55afbf18ff5c36d831f372c50eac73cff340a76229bebeea0f061e706
font_01_sfnt_off00008368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8368 10144 bytes
SHA-256: bf675a9f2353c4e21544a3bf2a66978af9bf2449c72beb79865db99b27b52593

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