Malicious PDF — malware analysis report

Static analysis result for SHA-256 dce440a8feba857a…

MALICIOUS

PDF

53.9 KB Created: 2020-06-20 05:30:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3efc272087bd2c39029ba956015060df SHA-1: 9e5b1b5a7fc6a6692da88285a3eca9526746759c SHA-256: dce440a8feba857aa7f97c7ca8531a89b7717cd6a1b50ea78b2b4023e8c204b1
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to PDF files with numeric slugs, indicating a link farm for SEO manipulation. One of the embedded URLs, http://magentavi.com/uploads/1/3/0/7/130774973/130774973.html#electric+circuits+nilsson+riedel+solution+manual, is presented as a solution manual, likely a lure to encourage clicks. The heuristic 'PDF_SEO_LINK_FARM' strongly suggests a malicious intent to drive traffic to potentially compromised or malicious sites.

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://magentavi.com/uploads/1/3/0/7/130774973/130774973.html#electric+circuits+nilsson+riedel+solution+manual
    • http://winczok.com/uploads/1/3/0/8/130873828/7445658.pdf
    • http://pamaulakh.com/uploads/1/3/0/2/130289603/lowifa_ranutovekaruw_jiwufataliz_vexanivatumopo.pdf
    • http://cdn-7.fuzzfaced.net/uploads/1/3/1/3/131380756/d92f47b.pdf
    • http://mail.sebolt.com/uploads/1/3/0/2/130288394/3555908.pdf
    • http://fit-4-me.com/uploads/1/3/0/8/130813417/6592972.pdf
    • http://goldenmtnguides.com/uploads/1/3/0/2/130270781/37ab60b9.pdf
    • http://tomboyoriginal.com/uploads/1/3/1/3/131380730/5b185.pdf
    • http://southernsadie.net/uploads/1/3/0/5/130550796/298015.pdf
    • http://kaiser-roll-studio.com/uploads/1/3/0/6/130605472/kexebumupipixo_genakejuti_ganafavoxu_jagupabinebela.pdf
    • http://vcpweddings.com/uploads/1/3/2/6/132682107/2038169.pdf
    • http://southernsad
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000976f.bin
3b6a5f5897436d7a0dc708a36aca5a5c7594d54c5816a61bdf39bf0edc204741		 pdf-font-stream PDF embedded font (sfnt) at offset 0x976F 4924 bytes
font_01_sfnt_off0000a807.bin
2735d45d3c50ca390bb20a1f5ed61f6f3ef2943e1313305a806c23ec79ecf6fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA807 10252 bytes

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