Malicious PDF — malware analysis report

Static analysis result for SHA-256 de4d55e47424fac5…

MALICIOUS

PDF

48.2 KB Created: 2020-11-08 05:50:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: e600957123c0714404b6ec2b99d10707 SHA-1: 01094c0f54a8c27ebbb9af46be378e08e28c8107 SHA-256: de4d55e47424fac55272552976e92a66ace23b050db77bcf0df54da93288d8c8
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://traffmen.ru/aws?keyword=mr+walker+s In PDF document text
    • https://bitekiparoduj.weebly.com/uploads/1/3/4/0/134017536/bamekavu.pdfIn PDF document text
    • https://molegogadamo.weebly.com/uploads/1/3/4/3/134341439/nurof_luladipijov_sovikefaxe_fojigituzafavo.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/34531.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://uploads.strikinglycdn.com/files/c2959097-06e0-4d34-8a33-b78e391560ea/viwolubetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fba39e58-deaf-431d-ae2f-a300468ed449/how_to_crack_fl_studio_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b772b2ee-b9d1-4329-9cd2-f6251dda29f0/dnd_deep_speech.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f4cc10c-54e7-4af0-b69c-2fa35aaca37d/dilubopefokanatojezaxupuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab59a6d3-16b0-4b60-bc69-65df2d8486fa/diwofumasofumav.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/net_investment_in_operating_capital.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b82874b0-d84f-4948-9c03-9ed6d2e4324c/86149957149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b65179c-89f1-4243-877b-278f41bce3b2/elfman_fairy_tail_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3353720-f24d-4564-b84b-5007eaa81881/92378276013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98615b94-cef7-4847-9131-724c52f7ba0f/68990332928.pdfIn PDF document text
    • https://s3.amazonaws.com/welutizenop/59493227777.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_off000074fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74FC 4284 bytes
SHA-256: 622b4532f29de72e9164b2de20da72d0274e5def2bffcfb0d302422bd8e236a7
font_01_sfnt_off00008391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8391 10108 bytes
SHA-256: 5b0308c0746e88c157f3979026bae3b25835f530f312be26f76b7f3c6a9265f8
font_02_sfnt_off0000a62f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA62F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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