Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b911f99209e964…

MALICIOUS

PDF

36.6 KB Created: 2020-04-09 17:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7592da8de6881307f1c711ff9d975981 SHA-1: 51bbcac6f8002525702a77ed88c694e133ce8f42 SHA-256: 07b911f99209e96450c7bef216c3f5757d10ea4641a359760ff5c2af213ea965
96 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of SEO spam or a link farm, embedding a large number of external URLs. The ML classifier strongly indicated maliciousness, and the PDF structure contains numerous embedded links pointing to potentially malicious or deceptive content. While no scripts were directly extracted, the embedded URLs suggest an attempt to redirect users to external sites, possibly for further exploitation or phishing.

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://patriotspray.com/uploads/1/3/0/5/130540767/130540767.html#the+witcher+3+collector%27s+edition+st
    • http://thegiftalley.com/uploads/1/3/0/5/130551611/49b1f6a2.pdf
    • http://dilvideo.com/uploads/1/3/0/6/130639655/pufaxawunajafu-wujobazevu.pdf
    • http://bigorangemkt.com/uploads/1/3/0/6/130620979/3e15ab0ab4b7c.pdf
    • http://doulainhudsonvalleynewyork.com/uploads/1/3/1/4/131453421/9264204.pdf
    • http://myartisanapparel.com/uploads/1/3/1/3/131380895/3856717.pdf
    • http://nataliemerritts.net/uploads/1/3/0/5/130589444/kalebonezela.pdf
    • http://theupswingers.com/uploads/1/3/0/9/130968949/zuzozi_gibamed.pdf
    • http://dans-les-arbres.com/uploads/1/3/0/9/130969418/doxafejezeme.pdf
    • http://dantechconsultant.com/uploads/1/3/0/9/130969654/5568730.pdf
    • http://fletchproductions.org/uploads/1/3/0/2/130289421/6030623.pdf
    • http://melissacierley.com/uploads/1/3/0/9/130969433/2006193.pdf
    • http://kddc.shop/uploads/1/3/1/0/131071210/jenumiligajaxud-mavad-jitava-lizagaxofizemet.pdf
    • http://hardworkerslandscapingllc.com/uploads/1/3/0/7/130776451/8d08e1.pdf
    • http://bargainlivingeugene.com/uploads/1/3/0/2/130273789/773967.pdf
    • http://upholsteryer.biz/uploads/1/3/0/7/130739936/namape-nomame.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_off00006241.bin
285de9b9dbeaeb63c515d13c823a55185c7fc371569b114164a67f7fd6ad6e37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6241 8744 bytes

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