Malicious PDF — malware analysis report

Static analysis result for SHA-256 567f7cf9fb70420d…

MALICIOUS

PDF

40.6 KB Created: 2020-04-11 05:49:42 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 37f2702a51b63832804105945e5a5019 SHA-1: 05c00224b995d3afc97f0ac61d3df10bfa84d2db SHA-256: 567f7cf9fb70420da1828c34443a5669b1df848f9519c588261729a8d9a39eed
104 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files hosted on various domains. This indicates a link farm designed to distribute malicious content. The document body, though partially corrupted, contains a URL that appears to be a lure for educational material, likely to trick users into clicking the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://74-123-78-154.mgwnet.com/uploads/1/3/0/6/130640141/130640141.html#saunders+comprehensive+review+for+the+nclex-pn+examination+test+bank PDF link annotation
    • http://everythingwireless.ca/uploads/1/3/0/8/130873880/kabuwagugiwe.pdfIn PDF document text
    • http://cohesif.net/uploads/1/3/0/8/130814286/xogilafoje.pdfIn PDF document text
    • http://liveloveandfaith.org/uploads/1/3/0/6/130639910/08b95cf5749f.pdfIn PDF document text
    • http://buttonhookshop.com/uploads/1/3/0/6/130639926/dafanewesawinilezage.pdfIn PDF document text
    • http://nateflipkinowski.com/uploads/1/3/0/2/130287310/vowiseb.pdfIn PDF document text
    • http://blingafied.com/uploads/1/3/1/4/131438419/133534.pdfIn PDF document text
    • http://cpsplantscapes.com/uploads/1/3/0/2/130270781/fakiralizudiri_fajedenorero.pdfIn PDF document text
    • http://darasyrkin.net/uploads/1/3/1/4/131406826/jutuxevijerofap_menuj.pdfIn PDF document text
    • http://androft.com/uploads/1/3/0/7/130738792/neroxakujo.pdfIn PDF document text
    • http://hendersonhslibrary.com/uploads/1/3/1/4/131453544/4922607.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B25 8676 bytes
SHA-256: d8b554f2070e7cf693c9a9fd9c36aaf3304e56b13ae3a078f2bacd51eeeda2b5
font_01_sfnt_off00008c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C67 2596 bytes
SHA-256: 87fd6b1a35a64f5c2d30902eea89631a9c05d6b36ef70c6d0cee4d2ad867525e

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