Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0412107be2a07d3…

MALICIOUS

PDF

41.2 KB Created: 2020-10-30 06:35:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 533e987a0d40e2bc86a9f89214290fdb SHA-1: d87273a4d828c3fb52c7de8fd07771caf2f71812 SHA-256: f0412107be2a07d3566eecd2412f10baeabca78987799c8166182c5cc6fe461a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/123?keyword=grand+sands+volleyball+leagues In PDF document text
    • https://lapebezufidasaz.weebly.com/uploads/1/3/4/3/134316617/6e7ee79687.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/fd026ff.pdfIn PDF document text
    • https://sipasegeremiraf.weebly.com/uploads/1/3/4/4/134404187/378808.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://s3.amazonaws.com/susopuzupure/bosch_steam_boiler.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/aufgaben_englisch_klasse_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0277/3408/1726/files/86842737568.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/12276427349.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/ansible_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3382/8769/files/roperufo.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/zofudabumapetimezave.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3592/1064/files/37894338051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2891/3560/files/tizawimowegovuf.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_off000052f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52F7 5080 bytes
SHA-256: 7676e9db081f7b799a579f4be6875957f7d63ba654e5eea94e470a0adbbb6c94
font_01_sfnt_off00006458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6458 11336 bytes
SHA-256: ffdd13732033346cfb21c55b7659560e97aa60c8f605394f100e5717aeaccc10
font_02_sfnt_off00008a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A04 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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