Malicious PDF — malware analysis report

Static analysis result for SHA-256 71ada32480aa856b…

MALICIOUS

PDF

70.6 KB Created: 2020-12-02 20:22:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f9ad0815c7201a87259ecc55d3f3fa84 SHA-1: 93c2821eb118c75c9a9f2610fcf8beda472f717d SHA-256: 71ada32480aa856bbdcfd4d2aae26dc53022f3a4e652fed69184f2a073b1f884
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://traffset.ru/aws?utm_term=news+report+intro+sound PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416806/normal_5faa80238289d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453579/normal_5fc752d59c0a2.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/1ddb37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380876/normal_5fb28f3e660de.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf586e18e72e5fdbcee2c0/1606375536273/vunokabajizoje.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c66b27a199023ab4af32/t/5fc55a9d3570fb44d1b566da/1606769310323/xinudifugijobemajadiwere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bc83a91-ebfd-4e9b-96ff-c25544ececcc/modelo_entidad_relacion_ejercicios_resueltos.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0dda68bfc518616a3e5e/1606225371349/alex_libby_pilates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10818659-dae7-4d8e-a296-ee8a26497756/vadomurajofibegutejabez.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eacbc14dfd36fef1915a/t/5fc459727acac6192a4bc7e4/1606703474667/47999343277.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6692c60f2895dc10d8c09/t/5fc77431a3696915e22635c1/1606906929502/android_system_webview_enable_not_working.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC2F 4656 bytes
SHA-256: 7e7ef1d9c46617b41ce3da4ea464904de8a32548c82db1659cdcf5432fe3e6e3
font_01_sfnt_off0000dc1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1E 10744 bytes
SHA-256: ded15e41cbf53e08311670ab803a248ad3b82b85610b21f793bae488d499887e
font_02_sfnt_off00010017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10017 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.