Malicious PDF — malware analysis report

Static analysis result for SHA-256 46ebce58dcac7181…

MALICIOUS

PDF

75.6 KB Created: 2021-04-04 04:41:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 16725431c08bcc2b762b58b7871f9603 SHA-1: 81a9b25fcc64cf57ee030c9f96b546b377a657fc SHA-256: 46ebce58dcac718170a60b968bc5f65afff4bc0da6f0187f7a65dad6aa28d3d5
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 0.9996

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://maypoin.ru/123?utm_term=bsf+application+form+2019+date PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463824/normal_604ce1601bf6e.pdfIn PDF document text
    • https://mafexanilexa.weebly.com/uploads/1/3/0/7/130739060/8f5b3e97b6c9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_605a433de3c1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369788/normal_5fc76fd4c8776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5fdb411be7392.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455399/normal_6044770feb2bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481667/normal_60233688019dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503525/normal_600a461a9b5bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425235/normal_600b77e05fbb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382976/normal_6068f9c575090.pdfIn PDF document text
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/5569004fc49a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461525/normal_5fca3a14b1eec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423443/normal_60248e7e7ae2e.pdfIn PDF document text
    • https://sazopugewado.weebly.com/uploads/1/3/1/4/131453094/woraxikapatowizanes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454420/normal_6007586e07b18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379053/normal_5ff5186a5479e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460677/normal_5ff4d2d296c57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371809/normal_601aa937bb93a.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/zikeko/45297571306.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/bedetaremitobig.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/newborn_cute_baby_boy_images_free.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE713 5832 bytes
SHA-256: f7307a0b4efacced3d9063197664e70332ab79471dd9bb02850b3f88b76cfa5a
font_01_sfnt_off0000fadc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADC 10668 bytes
SHA-256: 7b6dd253cd26ecbe15ac5dbe221d272f291bfa7d57fd246c71644e96a41a52cf

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