Malicious PDF — malware analysis report

Static analysis result for SHA-256 19e594c848a302f2…

MALICIOUS

PDF

35.3 KB Created: 2020-06-06 05:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa2e7accbc7313b8bd43c96b68962289 SHA-1: c7e22219630783972c61e67c36c94eb7dc1c5c5f SHA-256: 19e594c848a302f2b5a77657e12f7af22182d9a368d2ba0726cf9f67f1dda7ea
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 poisoning or to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, indicating a network of linked PDFs. The embedded URL and the numerous other URLs extracted from the document point to a coordinated effort to distribute content across multiple domains. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://aqueenwithpurposeshop.com/uploads/1/3/0/7/130775763/130775763.html#asexual+and+sexual+reproduction+worksheet+doc
    • http://honestcpu.com/uploads/1/3/0/3/130379222/pomadelegisabuwak.pdf
    • http://nanascomfortfoodskansas.com/uploads/1/3/1/4/131412290/jobumujapafab.pdf
    • http://foxvalleybikefit.com/uploads/1/3/1/6/131606335/16ef8.pdf
    • http://mx.jarrettwoods.com/uploads/1/3/0/6/130604922/fobadafanuz.pdf
    • http://reimaginedclassrooms.com/uploads/1/3/0/5/130589070/1381368.pdf
    • http://ianfisher.net/uploads/1/3/0/5/130590043/03c2c2f3f0b42b.pdf
    • http://aqueenwithpurposeshop.com/uploads/1/3/0/7/130775763/terms.html
    • http://aqueenwithpurposeshop.com/uploads/1/3/0/7/130775763/dmca.html
    • http://aqueenwithpurposeshop.com/uploads/1/3/0/7/130775763/policy.html
    • https://xunujodir.files.wordpress.com/2020/06/24503387630.pdf
    • https://kekazemigix.files.wordpress.com/2020/06/83747370895.pdf
    • https://nulumilawo.files.wordpress.com/2020/06/44666456053.pdf
    • https://panuvezipib.files.wordpress.com/2020/06/9399647752.pdf
    • https://xoxexiro.files.wordpress.com/2020/06/zalorukonumefosuj.pdf
    • https://jakusenugus.files.wordpress.com/2020/06/xavifu.pdf
    • https://zefozes.files.wordpress.com/2020/06/59114654626.pdf
    • https://nemununuban.files.wordpress.com/2020/06/jipaxefavu.pdf
    • https://velefibilon.files.wordpress.com/2020/06/9774738023.pdf
    • https://rotodiduluf.files.wordpress.com/2020/06/14426938408.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_off00005f73.bin
528397b6120048702ac497b669666ca00ffb84102656265916c30c25e1e44091		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F73 9888 bytes

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