Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a7022fa40ac6c2b…

MALICIOUS

PDF

46.2 KB Created: 2020-10-08 16:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bdc1c015d316456679069a43d9e98df8 SHA-1: eb0edaca674bad2219da6297e752cc113c271503 SHA-256: 1a7022fa40ac6c2b2fbecb282f980c595d39afd0402e7a0d7942e6a477a680d2
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/pify?keyword=honors+chemistry+specific+heat+worksheet In PDF document text
    • http://patuneka.pawsitivedogtraining.org/uploads/1/3/1/0/131070420/6773683.pdfIn PDF document text
    • http://tirazak.deathcareaware.com/uploads/1/3/0/7/130775052/sovesesipefi.pdfIn PDF document text
    • http://ropuxege.oneworld-wellness.com/uploads/1/3/2/3/132302782/xovanutowopesuriti.pdfIn PDF document text
    • http://files.jurassicriders.com/uploads/1/3/1/4/131406999/9161794.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/1/0439/6898/7294/files/tipos_de_ficheros_usados_en_chapa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0886/0575/files/geometry_for_college_students_martin_isaacs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6302/0193/files/celerity_of_punishment_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/4306/5503/files/dudosasoveliluraga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8516/0857/files/depelenogoxasus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/2012855815.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7537/9101/files/55780246047.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5859/3431/files/bathroom_exhaust_fan_motor_bracket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5634ff89-2cbc-4278-8dcd-eff66c48b488/12227745651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/438e02c6-5778-4d70-90aa-a15e3e812cd6/83758729366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c03bd55a-ca73-425b-900f-56f3e4e0a690/10635875727.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_off000068de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68DE 5228 bytes
SHA-256: 33b3b0bbae1c0c19764a910016f8fe8c941c41cab756dd0da544299fc0aef93b
font_01_sfnt_off00007a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A82 10228 bytes
SHA-256: 3fddf981aa0fdf4f8356dfabd58b60fe4024d69216353d987e95fee4018d4ad8
font_02_sfnt_off00009d6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D6B 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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