Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bfc803d3671e968…

MALICIOUS

PDF

42.8 KB Created: 2020-03-22 04:26:29 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a84854e27ed0f325479df83f9f3f195d SHA-1: 01b3991bc99bcee2ce08a067437ad9830611c76a SHA-256: 6bfc803d3671e968f004a7e86460f4fa1abb51dde31cbee7d1c3fc19c3acd991
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or a distribution mechanism for malicious content. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially harmful content, possibly for SEO spam or malware distribution.

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://houseforsalellc.com/uploads/1/3/0/4/130489367/130489367.html#waring+commercial+belgian+waffle+maker+ww180
    • http://wearebarnfield.com/uploads/1/3/0/7/130775912/3df538378f.pdf
    • http://moriahellamason.com/uploads/1/3/0/7/130775808/56e1b57509b.pdf
    • http://borsate.com/uploads/1/3/0/3/130313284/kumuriwexo.pdf
    • http://southafricaunbound.com/uploads/1/3/0/7/130739590/9457885.pdf
    • http://bonniesthlm.com/uploads/1/3/0/4/130477018/sorem.pdf
    • http://tylernjoten.com/uploads/1/3/0/7/130776381/4d9f949e23.pdf
    • http://goodrivernaturopathic.com/uploads/1/3/0/5/130550690/145763.pdf
    • http://insideuco.net/uploads/1/3/0/4/130489342/lugebikuw_firijuguj.pdf
    • http://shadowlights.cafe/uploads/1/3/0/6/130639994/ca9b6.pdf
    • http://rrphotography.studio/uploads/1/3/0/6/130639334/vebabefomajis.pdf
    • http://www.topleadsgeneration.com/uploads/1/3/0/9/130969411/nurabinabij_kiboj_wozovojeminepav_lirarukuna.pdf
    • http://www.lyndseyhaskell.com/uploads/1/3/0/9/130969177/780761f5b8a3f73.pdf
    • http://waffledaze.com/uploads/1/3/0/6/130604248/boliwopekobu.pdf
    • http://www.iamimagemusic.com/uploads/1/3/0/5/130547624/bemewuxazoj.pdf
    • http://www.samkurzontkowski.com/uploads/1/3/0/4/130436154/pofolu.pdf
    • http://www.fultonelementarypta.org/uploads/1/3/0/6/130621033/3573443.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_off00007c90.bin
7d76cf5d04b262dd9f9268c9ff03af79fe6dfee175ed158d42229f2cf1c2cc31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C90 8764 bytes

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