Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c612c55222bbad6…

MALICIOUS

PDF

38.5 KB Created: 2020-10-08 22:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e947542ebc426635f71687b1740c74c6 SHA-1: bbf28c47ddbbc9d9b44c72b692ec2f803d846bfa SHA-256: 0c612c55222bbad6e225ac0399f3aa45ee8e72a64794e2aa5f97b63d99568431
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/strik?keyword=michaux+state+forest+map+pdf In PDF document text
    • http://vapigupi.saintgregorysileby.org/uploads/1/3/1/3/131380934/kotebogisarisaf-folijoma-rojugizaj.pdfIn PDF document text
    • http://jetunax.calaverasarts.org/uploads/1/3/2/7/132741100/3500105.pdfIn PDF document text
    • http://files.adamorbis.com/uploads/1/3/2/8/132815961/4a281020b.pdfIn PDF document text
    • http://files.smallgreatmusic.com/uploads/1/3/0/7/130775435/duxoru-kokape.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/1/0493/5231/0943/files/juledafabidenizonalonota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3411/8808/files/kabibofigomebabexunuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6614/6472/files/molar_mass_of_silver_nitrate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/552a741f-b806-48b1-9b53-49a2218a5c12/76522508707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8ba3e1e-551d-4b7a-a4d7-7b048378e5f9/11390719536.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a507628e-3f56-447d-ba81-1f7be6aae8c0/lapibig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f13f55d-17a8-4bb3-8299-28ffc224c987/sebovivizejazuzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2147/9331/files/textbook_of_microbiology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3450/7426/files/el_canto_de_los_pjaros_pelcula_completa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6761/3090/files/stevens_family_taekwondo_summer_camp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8667/8683/files/76125945135.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_off00005496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5496 5436 bytes
SHA-256: 17aca17acf748624cf49403130caa816025b0180fe6ae63b134bdd5b7076c726
font_01_sfnt_off000066fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66FA 11480 bytes
SHA-256: 1035bd6d9b040891af3433c475e3a86008eb6f9902a678e3011758b0fbfc3e14

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