Malicious PDF — malware analysis report

Static analysis result for SHA-256 501acaccc3293cd5…

MALICIOUS

PDF

43.2 KB Created: 2020-03-19 14:00:30 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: eb8bb4bc8251d76a2d3b49a50af99c21 SHA-1: e58baa9647f570d09bd5175eda0420b5e57cc5c1 SHA-256: 501acaccc3293cd5f437c4291941a2b7d6abfd6ef45b9688c99cbc8486b286b9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on different domains. The ML classifier also strongly indicated maliciousness. This suggests the document is designed to lure users to malicious content, likely for SEO poisoning or phishing purposes. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://phyllisemeldadesigns.com/uploads/1/3/0/4/130490786/130490786.html#suunto+core+military+time
    • http://adammarkeckman.com/uploads/1/3/0/5/130543262/konilot.pdf
    • http://vaporful.com/uploads/1/3/0/7/130776754/vegujox.pdf
    • http://pwhomeimprovement.net/uploads/1/3/0/7/130776322/nobuxiguze.pdf
    • http://espinoza-asoc.com/uploads/1/3/0/9/130969816/lesatesivazif.pdf
    • http://goodlifegrill.com/uploads/1/3/0/5/130550949/jararigu.pdf
    • http://msbr.ca/uploads/1/3/0/7/130775884/284ce56c0d.pdf
    • http://quotes-n-quips.com/uploads/1/3/0/3/130379912/kotule-vovuxedumabesul-fulejojewi-vemivuvevosit.pdf
    • http://www.elizaleephotography.com/uploads/1/3/0/4/130477249/8d76f15.pdf
    • http://crosspar.net/uploads/1/3/0/5/130590400/a43db35.pdf
    • http://greysay.net/uploads/1/3/0/6/130639517/8798496.pdf
    • http://maxigesso.com/uploads/1/3/0/8/130813973/5957296.pdf
    • http://555consulting.com/uploads/1/3/0/7/130738759/batibigivikevuna.pdf
    • http://stewies.store/uploads/1/3/0/6/130639157/nubuli.pdf
    • http://theantilogy.com/uploads/1/3/0/6/130621915/5591984.pdf
    • http://empowermiami.com/uploads/1/3/0/4/130435631/mixifufi.pdf
    • http://mta-sts.mail.dickersongreenseminary.org/uploads/1/3/0/7/130740044/6f6201ff1d2.pdf
    • http://jbstires.com/uploads/1/3/0/7/130775013/gapuwezi-rufokagaxafaja.pdf
    • http://help4heart.com/uploads/1/3/0/2/130288909/suwaxu_gikovu_zakadiresuluza_pokoki.pdf
    • http://taiyangchengguoji.br3h.com/uploads/1/3/0/2/130272973/3876431.pdf
    • http://smithscateringholbrook.com/uploads/1/3/0/4/130483725/1779b216c2c0cd.pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a70.bin
4f48dbb88384ac82c645f3375a36b44f52d2e77f42f02c6bf83b319e021d0bb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A70 8060 bytes

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