Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a89cc966d339e64…

MALICIOUS

PDF

95.0 KB Created: 2021-02-17 09:39:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c0bd09bd2512e9a65d355f4fe53a58ae SHA-1: 1c8bd9625b9efc5b79813db2dcf955d49702ebbc SHA-256: 5a89cc966d339e64c835aa58698d1acc79dfeeb4da6b325b81ab19ea639cba0f
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a notable one pointing to 'seumenha.ru', which is flagged as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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://seumenha.ru/wix?keyword=sylveon+pokemon+sword+bulbapedia PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4403539/normal_5ff2b4e3ed517.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426815/normal_5ffa81ac7d508.pdfIn PDF document text
    • https://nomibazet.weebly.com/uploads/1/3/1/4/131437462/49a8b7f134e8d.pdfIn PDF document text
    • https://lonunirixug.weebly.com/uploads/1/3/2/7/132710494/9236474.pdfIn PDF document text
    • http://gidepel.22web.org/suburok.pdfIn PDF document text
    • http://lianhua.life/33110206379u2hfc.pdfIn PDF document text
    • https://lufumapapolag.weebly.com/uploads/1/3/4/3/134353855/67877f4.pdfIn PDF document text
    • https://gegawega.weebly.com/uploads/1/3/0/7/130739786/e130cd7913.pdfIn PDF document text
    • http://shop-profildoors.ru/6089778769205vyv.pdfIn PDF document text
    • https://lejonelawubuw.weebly.com/uploads/1/3/1/4/131453657/2ada49d0279a878.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://jilagikudi.rf.gd/berghaus_shorts_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/aha_hcm_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/avery_5163_template_microsoft_word.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/raman_abdullah_movie_song_starmusiq.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/digital_citizenship_worksheets_for_elementary.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7A 3808 bytes
SHA-256: 4b5fc486ab938591351d01789bb084e1a560b74b462b108dbe7d127e0f2e8d0e
font_01_sfnt_off00011831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11831 5668 bytes
SHA-256: 225597b993f20e224883dac7e064667628b70208259baf9d81ae00e5f0fb676b
font_02_sfnt_off00012b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B70 6228 bytes
SHA-256: b9da9f493e04e0bf42287369c244b19025d3f84a66f07d03516cba40850a6d86
font_03_sfnt_off00013bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BC6 10740 bytes
SHA-256: 32799da9f5dc3d52b77908ac4467174d642056f031e8bd7931d9f945f9c7b405
font_04_sfnt_off000160b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160B4 2748 bytes
SHA-256: 114da1135bc5109668959655307fcb89f652bfd1274f9f5ad7bc956793ddb444

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