Malicious PDF — malware analysis report

Static analysis result for SHA-256 558970f71a85dba8…

MALICIOUS

PDF

40.3 KB Created: 2020-04-04 08:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a7a6856292de879fc431f401d1bbf88b SHA-1: 326adde1e0771d1f81f95d7b12d91badd4205c31 SHA-256: 558970f71a85dba811a6140cb40bf71ba1e281fe16419bff18e813ba3b740058
92 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, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness. The document body contains garbled text but includes a reference to a URL, which is also listed among the numerous external links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://vancouverislandwilderness.com/uploads/1/3/0/6/130604373/130604373.html#prayer+of+jabez+song
    • http://armwrestlingarchives.com/uploads/1/3/0/6/130621006/xedatibizipitufizix.pdf
    • http://mybotoxboutique.com/uploads/1/3/0/8/130874034/sogokegija-sevugadijasofo-kidit-linasenumiw.pdf
    • http://michaelrifeonline.com/uploads/1/3/0/4/130488338/pazufawuzin.pdf
    • http://fragcreation.com/uploads/1/3/0/4/130483973/819948.pdf
    • http://criservices.com/uploads/1/3/0/7/130739904/baxukerekafoxis.pdf
    • http://decalremovalkit.com/uploads/1/3/0/8/130813645/vuguxabubo.pdf
    • http://globalscio.com/uploads/1/3/0/7/130738951/753826.pdf
    • http://thechopstickdiet.com/uploads/1/3/0/3/130323962/6006360.pdf
    • http://flowerblush.com/uploads/1/3/0/5/130542985/kizazixu-susikilotow-guxes-segaponipi.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_off00007660.bin
0e1fad9c8f76ed48763d71ec2750a4f08b682ad6abe5f968e21e362fa0843a81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7660 7840 bytes

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