Malicious PDF — malware analysis report

Static analysis result for SHA-256 483a88582c140bc0…

MALICIOUS

PDF

78.0 KB Created: 2021-04-08 05:48:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 403a6c9548d0d8c2f96586c0085ef20a SHA-1: 18ea8522b87b1cf2022c260dceadc585fed9217d SHA-256: 483a88582c140bc0cc9da0bad944be6d95f2784817235449de253e459a54455e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://dugedepap.ru/wix?keyword=psychonauts+milkman+guide PDF link annotation
    • http://tpdreport.com/what_is_the_best_sewing_machine_to_buy_in_australia2yuv2.pdfIn PDF document text
    • http://bisibometixo.mywebcommunity.org/blank_biodata_format_for_job_free_download.pdfIn PDF document text
    • https://tidijutaxidekoz.weebly.com/uploads/1/3/4/5/134589823/370fd12fcdae2.pdfIn PDF document text
    • http://laura-egorova.ru/admin_template_html_bootstrapoijae.pdfIn PDF document text
    • http://sevoxotedeki.medianewsonline.com/i_am_from_poem_examples_for_high_school.pdfIn PDF document text
    • https://vejewumuwuwaja.weebly.com/uploads/1/3/4/7/134759129/gafupuk.pdfIn PDF document text
    • http://dalnoboyi.xyz/where_to_watch_the_hobbit_trilogy_for_freejv1cc.pdfIn PDF document text
    • https://kuvomudoriri.weebly.com/uploads/1/3/1/4/131406544/begivelapoxegu_weluferegodaj_kivipivelowi_nakovizido.pdfIn PDF document text
    • https://soxapibojewaw.weebly.com/uploads/1/3/5/3/135345372/d6be27b.pdfIn PDF document text
    • http://damvglaz6.xyz/37882387383al4pt.pdfIn PDF document text
    • https://vakumijajuxos.weebly.com/uploads/1/3/4/4/134465568/5162417.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://29ce6865-365c-47c4-9f0a-635d6f965865.filesusr.com/ugd/0d6b77_0a7eaf72abbb4d7fa5e4fd0f0687b758.pdf?index=trueIn PDF document text
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_7935c5a016fb42d9a8f582ad14c3cfa5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/confucianism_and_filial_piety_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/26014205354.pdfIn PDF document text
    • https://5de9ed01-d610-4143-94db-6f998645a8ce.filesusr.com/ugd/1d8bf6_0089ac2c79614aa7a474bdfdfe54262a.pdf?index=trueIn PDF document text
    • https://43dda2ad-fadc-418c-a2d5-4b96cca2ed60.filesusr.com/ugd/6eca9c_b401ad45b2ff4d93a6fcf8c408c28a4a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/somodezisu.pdfIn PDF document text
    • http://situwosase.myartsonline.com/coordinate_plane_worksheets_grade_6.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/36239823757.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_off0000f3e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E1 5424 bytes
SHA-256: c85cc63d8fbda48b1166634d22aa2f55ea2da2cac149fe277806998e9e6a1047
font_01_sfnt_off0001063b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063B 10772 bytes
SHA-256: c99e0d55c7a9d40d5bfb699f319c9ac948af69ff32af7247f0817c72a3eb975c

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