Malicious PDF — malware analysis report

Static analysis result for SHA-256 61630eae43f5605d…

MALICIOUS

PDF

84.5 KB Created: 2020-03-20 04:19:02 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 84f356119f61efc6064e7b175cf27bea SHA-1: 1cc17b2826978fcb044d83836e818e2276d3807e SHA-256: 61630eae43f5605d9b3edc5cec8d8f3af040d7882b9158df4bbce7d6e3cd2110
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by an ML classifier and contains a large number of external links, indicating a potential SEO spam or content hosting scheme. The primary heuristic identified a link farm with 30 external PDF links, suggesting an attempt to manipulate search engine rankings or distribute further malicious content. No scripts were extracted, but the sheer volume of outbound links is highly suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://systemssocialism.org/uploads/1/3/0/5/130589057/130589057.html#conducto+inguinal+anatomia
    • http://webdisk.paintedtabledesigns.com/uploads/1/3/0/7/130776865/dcae91ac.pdf
    • http://framebuyframe.com/uploads/1/3/0/6/130604338/407380cc.pdf
    • http://unitedplanetearth.org/uploads/1/3/0/2/130272327/fivoselufi.pdf
    • http://bethechangenw.org/uploads/1/3/0/5/130551206/taniselebisofev-lezivajadogi-gawerubozof.pdf
    • http://www.xmen-agency.com/uploads/1/3/0/7/130775610/25e0c541515b6ac.pdf
    • http://spencerjames.co.uk/uploads/1/3/0/4/130477533/merelaxemexo_tukeluv.pdf
    • http://www.nicklittlecott.com/uploads/1/3/0/5/130551957/878e319ded113.pdf
    • http://www.curve-n.com/uploads/1/3/0/5/130588153/risatelupak.pdf
    • http://maxharmofficialwebsite.com/uploads/1/3/0/9/130969798/6810734.pdf
    • http://berryessapetsfirst.com/uploads/1/3/0/3/130379194/ruxagabebidikaf.pdf
    • http://fernandodaviddesign.com/uploads/1/3/0/7/130738715/duzupebo.pdf
    • http://www.petzencard.com/uploads/1/3/0/3/130313411/vasox_bagidesisur.pdf
    • http://liqourlawvt.com/uploads/1/3/0/7/130775980/7c97247facd3.pdf
    • http://cindihinch.com/uploads/1/3/0/3/130323097/bukololimuvefogov.pdf
    • http://piecedtogether.org/uploads/1/3/0/2/130291575/1ef7d.pdf
    • http://jenscraftcorner.net/uploads/1/3/0/2/130272504/9595394.pdf
    • http://formula2fit.com/uploads/1/3/0/8/130814032/2939016.pdf
    • http://nikkibuyshouses615.com/uploads/1/3/0/4/130488914/646cfafc9.pdf
    • http://weizhou.studio/uploads/1/3/0/6/130604542/gonamilutipesanizube.pdf
    • http://millennialwomen.net/uploads/1/3/0/3/130323984/vameferire.pdf
    • http://us-11-2.octarinesec.com/uploads/1/3/0/2/130272877/puzimuwiguxuw.pdf
    • http://hostmaster.withoutstreaks.co.uk/uploads/1/3/0/9/130969918/divaluviwokax_jovuvelaweva.pdf
    • http://ceecentre.com/uploads/1/3/0/7/130776077/c41835e.pdf
    • http://webdisk.genesiscarconcepts.com/uploads/1/3/0/3/130323167/tegesufit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101a4.bin
725834bc962f6d7681f5787bfe91842ee4a42270600a2df1982f8ba33195c032		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101A4 9668 bytes
font_01_sfnt_off000123a7.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123A7 2652 bytes
font_02_sfnt_off00012d0e.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0E 16036 bytes

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