Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a346ef23aa23f6b…

MALICIOUS

PDF

82.0 KB Created: 2021-09-10 00:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 79ec972dc03dc05d5a41f89aa600d173 SHA-1: 9e420cb019702c9bbe35fc434eb552d4219743d8 SHA-256: 9a346ef23aa23f6baad695bab59663509149a8dcf1d76871d20cfb7245274817
126 Risk Score

Malware Insights

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

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 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/uplcv?utm_term=dragons+of+the+edge+download+apk PDF link annotation
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/34948171413.pdfIn PDF document text
    • http://mrtowing.ca/Lawyers/userfiles/file/tozirufoginevokanu.pdfIn PDF document text
    • http://mtt-association.fr/upload/file/76525477544.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/dozabofusulomexapigixumub.pdfIn PDF document text
    • http://needychild.org/ckfinder/userfiles/files/doxedanulosifubiwalub.pdfIn PDF document text
    • https://natatourism.com/userfiles/files/19186642590.pdfIn PDF document text
    • http://agppi99.pretty-match.com/upload/files/polisomupalawobuxafuvok.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/dulodiwevel.pdfIn PDF document text
    • http://enidental.com/userfiles/file/20210904171300.pdfIn PDF document text
    • https://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/96203353395.pdfIn PDF document text
    • http://norilsk.torbay.ru/images/uploads/file/zexopubosisi.pdfIn PDF document text
    • http://cncforginghammer.com/d/files/27384722602.pdfIn PDF document text
    • https://nyig.com/files/file/19459397497.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137edd87b095---74714528098.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/9913142355.pdfIn PDF document text
    • http://geometramaurotozzi.it/userfiles/files/97583120382.pdfIn PDF document text
    • http://sarkar.ie/userfiles/file/12409519660.pdfIn PDF document text
    • http://papierplus.pl/userfiles/file/bopeloxex.pdfIn PDF document text
    • http://zkmeiqi.com/admin/ckfinder/upfile/files/26597315214.pdfIn PDF document text
    • https://dongcohonda.com/userfiles/file/99673039500.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/70120849339.pdfIn PDF document text
    • http://turbotechnik24.de/userfiles/file/rinofajorilivam.pdfIn PDF document text
    • https://hoongnau.com/upload/files/25622519030.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/3001955873.pdfIn PDF document text
    • https://youtu.be/c6jieffqpjoaIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BE 10864 bytes
SHA-256: 80123344e0e1f25f53d793609978f6e4cd5deef789a1455144fd130e0ae12f3f
font_01_sfnt_off0000f0a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A5 18740 bytes
SHA-256: 64ff25d0cdacd0333550d590533902083589f1ed2af418482f5df3cd85120ada
font_02_sfnt_off0001221c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1221C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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