Malicious PDF — malware analysis report

Static analysis result for SHA-256 1091b7b307b9ba25…

MALICIOUS

PDF

48.4 KB Created: 2020-10-16 11:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4ad508ed787d8d57e0b93681a0f17e11 SHA-1: 31931ced5ebdf58cf1bc420e7801dd77b8dd6303 SHA-256: 1091b7b307b9ba2589f683fc9e3b2948b5fdaf6ba5d7f7e22fb0ecc7c730ce56
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/123?keyword=osisoft+pi+processbook+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f88cdb450b9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369522/normal_5f8857451a9c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5f875d562a442.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/batagebexi.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/daxasolizi.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rezareludufiven-voxodopi.pdfIn PDF document text
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/kafisepeze_goderepinivu_sebige.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/jesudasa_bidez_misunesamaki_takixezeve.pdfIn PDF document text
    • https://pivozedotafi.weebly.com/uploads/1/3/1/0/131070355/6651550.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/4468004.pdfIn PDF document text
    • https://dojudiwoju.weebly.com/uploads/1/3/1/4/131406456/xebobesik_kibetor_bubezugetokifen_bikuda.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/1/0493/3258/4607/files/55864889681.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0742/5699/files/western_global_airlines_dead_body.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7422/3269/files/75329047810.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6151/7217/files/titijufevapunamogixagad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8511/8638/files/data_collection_instruments_for_qualitative_research.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/dedipomorilozesamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8987/7405/files/black_diamond_tents_australia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5007/2214/files/honda_b_series_turbo_kit.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_off00007431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7431 5392 bytes
SHA-256: cb2c7c6151786198f16ed0268ffea9117658f97bb0fb0d2fcc5cd909c932e679
font_01_sfnt_off0000866f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x866F 14916 bytes
SHA-256: 0bcbc5cac206918409d332543972118d8bd1c8be4a8cb76b132218912606d218