Malicious PDF — malware analysis report

Static analysis result for SHA-256 38130480732541ef…

MALICIOUS

PDF

41.3 KB Created: 2020-10-08 04:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0ad061472c34c649c41f590732f5ba9b SHA-1: 384729537d8afedeb7f8dba88117ba32ea4929be SHA-256: 38130480732541eff260ddb6f311ad94ffb03b3229f427f11ebc5a5b1e01f1bb
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://cctraff.ru/strik?keyword=clasificacion+de+los+seres+vivos+por+dominios+pdf In PDF document text
    • https://site-1038468.mozfiles.com/files/1038468/39263139722.pdfIn PDF document text
    • https://site-1036880.mozfiles.com/files/1036880/laxosutugojiponifiket.pdfIn PDF document text
    • https://site-1036886.mozfiles.com/files/1036886/giwazazetobosijibonupu.pdfIn PDF document text
    • http://files.divinesoulenergy.com/uploads/1/3/0/9/130969819/d55ccdadbe3c.pdfIn PDF document text
    • http://files.kendraleighmakeup.com/uploads/1/3/1/3/131380175/vuxukos_resevuviguvelu.pdfIn PDF document text
    • http://wofipele.theexpatspeechie.com/uploads/1/3/1/3/131381241/rofisejeben-gogumefovot-zusuzuwolujenu-foromudovu.pdfIn PDF document text
    • http://pozid.bigbeantheory.com/uploads/1/3/2/6/132681237/bikifap.pdfIn PDF document text
    • http://nupopi.bridgeways2balance.com/uploads/1/3/1/3/131381521/zabopezok_nosowedotira_jowoniwoke_korewatetezofuv.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/1/0441/3734/9272/files/4096358434.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4848/0149/files/sumemesujoxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4178/2950/files/kewejemuleguvebosezidorip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9225/1302/files/aerosmith_tour_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9911cec4-efdf-420a-ac60-8da54dd5adab/79599025983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8722fc57-5836-4317-9be1-198804da0752/xogiruzofogapivasene.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_off000060bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BF 5264 bytes
SHA-256: 94b3cb2ea734a4387746626dcaafd70f92b4bb90f8cd8e0a88ab844421d57678
font_01_sfnt_off00007297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7297 10956 bytes
SHA-256: f68a19e7b9c67ac2157954e5ab104c5bb9ecdd66f2743c1657ee95d3bcb490a1

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