Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8648273f1b97283…

MALICIOUS

PDF

69.2 KB Created: 2020-11-30 13:14:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 031829d726bf1ae0453fdfe76a892bdf SHA-1: d9c70c97e404f464ac7c3b571fe8e9cc81f0d121 SHA-256: a8648273f1b9728332d0280121ae9d8194997ce789f3b6067c9985244204bd8f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and 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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://trafffe.ru/123?utm_term=de+me+llamo+rigoberta+menchu PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367004/normal_5f9750567af0c.pdfIn PDF document text
    • https://jopovasido.weebly.com/uploads/1/3/4/6/134619877/binir_nuneke_piwubev_zukezibojene.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373509/normal_5f8fe6647208d.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/rodidorama_vibexedu_sijetizosog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/98884192685.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/56989743678.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/2004_chrysler_pacifica_manual_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/welugatafamisaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87efb689-929d-4af2-922c-a659139d3dc9/40800609039.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/856dacd1-d977-49c2-b374-bb9f5096fc52/stealth_hunter_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/my_kutty_movies_2019_tamil.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf493f18e72e5fdbcdb7a7/1606371647377/84365659731.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e2fd6b97992eb55c026f/t/5fc162457acac6192af48b19/1606509126302/guvitojaxoruledafuzer.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_off0000cf13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF13 5176 bytes
SHA-256: 041517469bd3e62782ec5df916dfc57410756b19b778a24f794b9e6b98353064
font_01_sfnt_off0000e088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE088 11692 bytes
SHA-256: 0b158ef23c2209940b6c5ca7e2b05a2b00e499f8dc398378ec0509f12c95770d

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