Malicious PDF — malware analysis report

Static analysis result for SHA-256 533d28b419a05d3e…

MALICIOUS

PDF

43.5 KB Created: 2020-04-03 02:41:02 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fcac41c63b555b4d15fac5cf76e346ed SHA-1: 11e064cfb5f01112426c9f3b936da781a89e5619 SHA-256: 533d28b419a05d3e0181357eb2df92fd35f00cab0ff2883935cbe780dd83f510
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves leveraging these numerous external links to potentially distribute further malicious content or engage in SEO abuse.

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://deadballapparel.com/uploads/1/3/0/9/130969012/130969012.html#que+es+y+como+se+realiza+un+marco+teorico
    • http://vaughantractor.com/uploads/1/3/0/5/130551585/84bb6b27cf03.pdf
    • http://orphancaresolutions.com/uploads/1/3/0/6/130620687/86efdae18.pdf
    • http://happybabyseattle.com/uploads/1/3/1/0/131070329/ec396af9.pdf
    • http://hoperestorationservices.org/uploads/1/3/0/5/130590047/videposimalufesegugi.pdf
    • http://hostmaster.pentacleclub.com/uploads/1/3/0/5/130589229/265428.pdf
    • http://gracegolfguys.org/uploads/1/3/0/3/130379362/9a18ef9a5b.pdf
    • http://cameronhighlandsbnb.com/uploads/1/3/0/8/130813314/9314960.pdf
    • http://jamesorourkelaw.com/uploads/1/3/0/6/130620857/5721522.pdf
    • http://northwalestreeservices.com/uploads/1/3/1/4/131406436/5c83abd.pdf
    • http://drewgentleart.com/uploads/1/3/0/5/130539269/6364750.pdf
    • http://thealzheimersillness.com/uploads/1/3/0/5/130588639/bedebaxusinav-mulavuxusi-popogalizopam-tonebege.pdf
    • http://themetropolmedia.com/uploads/1/3/1/4/131438294/948da314fd6b.pdf
    • http://shopenb.online/uploads/1/3/0/6/130604322/mepexibok.pdf
    • http://onthegomarketing.org/uploads/1/3/0/5/130539492/220e9fba98.pdf
    • http://haam.info/uploads/1/3/0/6/130639423/f6f75a297.pdf
    • http://ascorabyggab.com/uploads/1/3/0/2/130272428/lamasi.pdf
    • http://absolutefloorsllc.com/uploads/1/3/1/4/131408917/kerij.pdf
    • http://thebeattapeproject.com/uploads/1/3/0/6/130604955/renilalivabe.pdf
    • http://lpcmath.com/uploads/1/3/0/5/130590532/mirakatemojo.pdf
    • http://shanleyhealing.com/uploads/1/3/0/6/130620240/kivavifov.pdf
    • http://southernheartdesign.com/uploads/1/3/0/7/130775104/dowekagiwikuxux-dozubezir.pdf
    • http://uxcpro.com/uploads/1/3/1/4/131452922/7902060.pdf
    • http://steamworksscranton.org/uploads/1/3/0/8/130874389/9f61acf.pdf
    • http://americanpastimebaseball.com/uploads/1/3/0/6/130604388/78c69050c7df.pdf
    • http://bridgettandlolas.com/uploads/1/3/0/3/130323291/1d89c5d71f33.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_off00007f08.bin
dccaa52bcb5ffc5a14c7ad9fb5e63a4f4edd943bb44ab561b3b1982b9893b625		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F08 8600 bytes

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