Malicious PDF — malware analysis report

Static analysis result for SHA-256 21eb536913a30644…

MALICIOUS

PDF

38.4 KB Created: 2020-10-26 07:23:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 8ac1ba41a29d8e6a828cfc77a5112ae5 SHA-1: 5bee50dd7149da37089a202d9595579196a6c2e6 SHA-256: 21eb536913a30644d172c9b54af16c226f55d362c56d93570d7dc25f40ac0121
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/aws?keyword=canzoniere+scout+reparto+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373004/normal_5f8dfe26314eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369914/normal_5f8a9b28d9ba2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f870c3b40779.pdfIn PDF document text
    • https://dawanuma.weebly.com/uploads/1/3/4/3/134305997/xefegedo.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/552d520069237.pdfIn PDF document text
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/8489556.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/cca67ccb-1ed8-48cc-8d41-50a04622b4eb/72777878670.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2827061a-5f2e-4f3a-bb64-9648f84685da/tabla_de_conversiones_de_unidades_de_presion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b0286d9-8d2c-4661-a9ea-d4098850b149/daycares_in_strongsville_ohio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6ca37e7-6f96-4e78-aac9-71a2b62c4cb3/54190753322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c361102-3ba4-4fe0-b371-a83df0cdf96e/ps4_emulator_for_windows_7_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/72104697727.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/55184447131.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/11114031162.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/vavogasezuwozulo.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/variable_costing_and_segment_reporting.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/gerao_baby_boomers_x_y_z_caracteristicas.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/pojub.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/bengali_calendar_1424.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/administrative_science_quarterly_journal.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/31386101576.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_off00005570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5570 5072 bytes
SHA-256: ce99044775d2516a4223a8b8455f47ece2cc03b031ab3f63edce369abd3eb8ab
font_01_sfnt_off000066c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C8 11368 bytes
SHA-256: 022cf27d17e53d81ca03867fe9ec65d051f47b6b0889b2803e125fd2cda6d681