Malicious PDF — malware analysis report

Static analysis result for SHA-256 42b9c2f6446ca705…

MALICIOUS

PDF

44.7 KB Created: 2020-10-25 17:05:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: d928a781793d5cc1ae4f11de9153342c SHA-1: 82acb94edc2fc3f034eb82886e564850e778bc45 SHA-256: 42b9c2f6446ca7057a7ec55227ba30f7059085f9750673c127c51a07c4dcad8f
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://gettraff.ru/pify?keyword=satlink+ws-6916+bedienungsanleitung+deutsch+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368237/normal_5f92756c41875.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388629/normal_5f952333a34c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f875003b146a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373527/normal_5f948567aeb66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376856/normal_5f8a31160d186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381971/normal_5f8e17ef0be97.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/bazoliv.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/gozawawi.pdfIn PDF document text
    • https://tiferivirukituk.weebly.com/uploads/1/3/4/4/134433041/womujoxadewu.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/900b0.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/f6b90c97.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0491/8145/8598/files/inherited_traits_worksheets_for_3rd_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/2812/3295/files/gafuzoxofawejubuxunabagav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8104/9288/files/gamma_phi_beta_alabama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4672/2965/files/menatolexuwulogefajiseja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3745/7575/files/geminofukowogupivebira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4135/7973/files/47624215114.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2094/9403/files/pseudomonas_aeruginosa_biofilm_formation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3336/5146/files/george_deever_all_my_sons.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2619/4333/files/ap_human_geography_population_unit_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6767/0689/files/44088731236.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D58 5888 bytes
SHA-256: a5eedb1e94beb6dc1306811dc6f8dd40e223211c30616f4e909b603d226e8b37
font_01_sfnt_off0000715f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x715F 11184 bytes
SHA-256: a87da5f32dd2af1e19da6fa78981ac1a5625b2e2312b4da2fd1ef7d1f82f27ce
font_02_sfnt_off0000967e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x967E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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