Malicious PDF — malware analysis report

Static analysis result for SHA-256 731527ce0388d956…

MALICIOUS

PDF

46.7 KB Created: 2020-09-30 03:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 74932368db3ef5550436277bda16c55c SHA-1: ff14cf8cda2644b4d5dd47623b3f26fd415e9bfc SHA-256: 731527ce0388d956a20048b44d9355d47715b65044914fbd376f82cf02de6f33
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://ggtraff.ru/strik?keyword=problem+solving+strategies+pdf+free In PDF document text
    • http://files.howardptsa.org/uploads/1/3/0/7/130775817/962007.pdfIn PDF document text
    • http://devizobin.hoppymeadowsrabbitry.com/uploads/1/3/1/4/131482995/pakuwemorexuge.pdfIn PDF document text
    • http://kigafa.inclusionandequityresources.com/uploads/1/3/1/4/131452821/516ee.pdfIn PDF document text
    • http://files.mallonhomes.com/uploads/1/3/1/3/131384643/sukusunusan.pdfIn PDF document text
    • http://files.shanebmckenna.com/uploads/1/3/1/6/131606197/b9c61f.pdfIn PDF document text
    • http://lodevuz.freespirityogi.org/uploads/1/3/1/1/131163981/10559.pdfIn PDF document text
    • http://files.deniserodgersbooks.com/uploads/1/3/1/3/131398100/tixutubaluzo.pdfIn PDF document text
    • http://files.dixiedeerclassicstore.org/uploads/1/3/0/7/130775357/mifonozagekun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/79432d90-1d91-4393-b7d3-d372d30dffa2/74181547834.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a743fe5-ec5b-487d-b3de-e3fb93b708ae/38478518903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3389/2763/files/simeposusawukaxavemifar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3027/3434/files/flat_stomach_exercise_at_home_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/2800/4254/files/towinuzawokefumon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2904/4127/files/viwetu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8641/3985/files/love_story_francis_lai_piano_sheet_music.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7863 5560 bytes
SHA-256: 050b8561fa2a160e920cf5b630a0568abb5470c9b22b6a331a7a01bf7e3f39d0
font_01_sfnt_off00008b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B37 10180 bytes
SHA-256: d710be46e25c56f29f394ea556dfd9026371d7a8b6be0d0154c22b8a875cc727

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