Malicious PDF — malware analysis report

Static analysis result for SHA-256 533768fbccf5dbe1…

MALICIOUS

PDF

38.2 KB Created: 2020-04-01 20:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e600620bfcb4a90fb259795871d596c0 SHA-1: 1781589e4b1a94958651103f7e8844ee9c8513fd SHA-256: 533768fbccf5dbe131ac3b8cabf86e36f5e205d3e91d471b8426d2391a20a6ea
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files on various domains, indicating a link farm or redirection scheme. The document body, though partially corrupted, contains a URL that mimics a software download, suggesting a lure for phishing or malware. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 http://fairfieldhomeinspection.com/uploads/1/3/1/4/131454396/131454396.html#blender+2.7+tutorial+deutsch+download
    • http://propedeuticatorino.com/uploads/1/3/0/3/130379117/af1d5ed4e9f22c.pdf
    • http://nozeypawz.com/uploads/1/3/0/7/130739720/0a37578.pdf
    • http://jabspainting.com/uploads/1/3/0/7/130738796/buxalofodumatonini.pdf
    • http://fingerlakesrose.com/uploads/1/3/0/7/130739493/1d57385.pdf
    • http://tessylou0.com/uploads/1/3/0/5/130551904/gikoliruwujav.pdf
    • http://varietycornerhangout.com/uploads/1/3/0/7/130775848/6463304dfb776.pdf
    • http://noviapsi.com/uploads/1/3/1/4/131454265/lexowivuz.pdf
    • http://urijazz.com/uploads/1/3/0/2/130289774/bupewemuzafusebe.pdf
    • http://deniseingrammd.com/uploads/1/3/0/6/130603808/9344892.pdf
    • http://affordablelegalforms.com/uploads/1/3/0/8/130873937/suluzofufojel.pdf
    • http://castleframingdrywallllc.com/uploads/1/3/1/3/131384688/mukuvujuxok.pdf
    • http://photo-globe.com/uploads/1/3/0/9/130969441/2992765.pdf
    • http://katherine-patton.com/uploads/1/3/0/5/130539517/nuvanitopo.pdf
    • http://fortheloveofsharks.com/uploads/1/3/0/7/130775001/debetefeteza.pdf
    • http://arizonadisinsect.com/uploads/1/3/0/7/130775868/zuxepeguruj-ripizape-jaxajojipofuvub.pdf
    • http://goodfindsatl.com/uploads/1/3/0/9/130969595/5847890.pdf
    • http://marcocardelli.net/uploads/1/3/0/2/130272102/4141821.pdf
    • http://procesa.us/uploads/1/3/0/7/130775358/binasusoba.pdf
    • http://photosbysarahtucker.com/uploads/1/3/0/6/130604581/7129201.pdf
    • http://iphoneprinter.com/uploads/1/3/0/2/130289653/ff33af9.pdf
    • http://justrecipes.online/uploads/1/3/0/6/130620788/6488639.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069ca.bin
dec563db079c9ce283987ad9086b80d3bc205e227f296c694860d29ccf590c6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x69CA 8128 bytes