Malicious PDF — malware analysis report

Static analysis result for SHA-256 b48b32be3821b8d0…

MALICIOUS

PDF

49.1 KB Created: 2020-10-15 10:27:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6be6d08ea7f91b048f1e75d57e471fe4 SHA-1: daf5618e7f8f8f2fd8fab919acfe895178907bbf SHA-256: b48b32be3821b8d0073428604b1e794f521db86e26bfc6a186789224fedbeda5
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/123?keyword=descargar+antivirus+avg+gratis+para+celular+android In PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/3257372.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8e42bfb8d1b0f.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/9876145.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/beparinunij.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/safado-fodidunixoso.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/mezevoxinokimuwamibu.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/76c30d49.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/8af89563c3c02b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f8773638eeb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f876c6f3f868.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f871ce95a9ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5f87cad980e12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f87449c2b182.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366973/normal_5f87af771853c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366958/normal_5f87c308d4e65.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/1/0463/0380/5600/files/futedixofinodevupaxal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8979/8317/files/electric_discharge_lamp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3886/6584/files/4369181445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/4184/0293/files/air_force_background_paper_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9864/5404/files/87885611160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4319/5546/files/fresno_high_school_football.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_off0000806c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x806C 5300 bytes
SHA-256: 0eba8bced65e1c4e9db358e328a55f0087fbf78d5ce04e0dfafb3e308a92a0eb
font_01_sfnt_off00009287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9287 10580 bytes
SHA-256: 2a8480a2532e0d4d53b3735279ba98212591250903c4ab46121a3dececd824cd

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