Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6eedfa17962183e…

MALICIOUS

PDF

94.7 KB Created: 2020-11-24 10:31:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d8b87a77fef8d714657db3fc289b7ff3 SHA-1: 1d9dfaf62a06efe50fb90037e611ba4b1db4b4a2 SHA-256: e6eedfa17962183e51b1082dcde935e22fc2d20ba00233675a232a1f55bf65c8
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 0.9997

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://trafficel.ru/123?utm_term=not+unique+table%252Falias+sequelize PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451039/normal_5fa44b939d5f8.pdfIn PDF document text
    • https://fexejolimoti.weebly.com/uploads/1/3/4/1/134131812/kegar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376878/normal_5fb541e999df4.pdfIn PDF document text
    • https://nusoselif.weebly.com/uploads/1/3/4/4/134470887/1324953.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a73a5938-26a8-4e86-a52d-e2f0dc9eb83a/zejulomidobawuzuxil.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/74461214323.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/caracteristicas_de_autoestima_baja.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/babikizikirokiritofem.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/dios_no_esta_muerto_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c38029f-25ff-4153-88ce-c1dec0a92990/zosev.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/wavizitezevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/425b6d56-df0c-4dc1-9e44-82359ceffc4b/55048520534.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/horizontes_del_suelo.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/75597563285.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/jagevoge.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/javevunufotuxuximajagek.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/rottgen_pieta_artist.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00014063.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14063 25380 bytes
SHA-256: fd92de69af31349c8092385d95c8a4dd5eaf5d91fe69e1d0d59b0987923d98a2
font_00_sfnt_off000108a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A9 4904 bytes
SHA-256: f6547eb400acae0dcc7b4b2af1e8768230125890055718bfc53fa0b7b867143d
font_01_sfnt_off0001197e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197E 11352 bytes
SHA-256: 5b97c6dd55babb8349836c075d01acb1d34874ed8cf035198ca312a90252907f

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